Appendix J. Genetic Implications of Recent Biotechnologies. Appendix Contents. Introduction
|
|
- Norah Caldwell
- 7 years ago
- Views:
Transcription
1 Genetic Improvement and Crossbreeding in Meat Goats Lessons in Animal Breeding for Goats Bred and Raised for Meat Will R. Getz Fort Valley State University Appendix J. Genetic Implications of Recent Biotechnologies Appendix Contents Introduction Reproductive technologies Artificial insemination (AI) Embryo transfer (ET) In-vitro fertilization Sex control Cloning Same-sex mating Conservation genetics Molecular technologies DNA fingerprinting for animal identification Marker assisted selection for polygenic traits Gene transfer and transgenic goats Chimeraism Summary Introduction Biotechnology can be broadly defined as the application of biological knowledge to practical needs (Bourdon, 2000). From an animal breeding perspective biotechnologies fall into two general categories, more or less. 1. Reproductive technologies such as artificial insemination and sex control. 2. Molecular technologies which can be used to locate, identify, compare and manipulate genes. Reproductive technologies Animal breeding and reproduction are two distinct disciplines. Animal breeding is a branch of genetics, and reproduction is an aspect of physiology. Yet, the two fields are closely connected. Although the underlying genetic principles of animal breeding are mostly independent of the physiology of reproduction, the practice of animal breeding is not separated from reproductive physiology. Selection and mating decisions are made in the context of available reproductive technologies, artificial insemination. 1
2 Artificial insemination (AI) Techniques for AI in goats are well developed and the technology is well accepted for use in many circumstances. Dairy goat breeders have successfully used AI for decades. The same technologies can be applied to meat goats. Artificial insemination carries three distinct advantages: It allows a breeder to use a buck that could not otherwise be afforded. It allows the use of a buck that is deceased. It helps control venereal diseases. Despite its availability and general success in goats, artificial insemination is not easy nor is it always practical. Does must be detected in heat, moved to a breeding area, properly inseminated, and at the right time. Estrous synchronization can make AI easier. This can be done artificially through a hormone protocol, or naturally by moving a buck nearby. This reduces the number of days the breeder must be on call for insemination. Average producers can learn AI techniques and be successful. Semen handling all the way back to the source, is a key element to success. Embryo transfer (ET) Embryo transfer is to does (at least to some degree) what artificial insemination is to bucks. This technology involves the collection of embryos from donor (genetically superior) does and the transfer of those embryos to recipient does. In most cases the donor is superovulated through a hormone protocol causing the ovary to develop and release more eggs than normal. The doe is then inseminated and after an interval during which fertilization occurs and the embryonic cells begins to multiply, the embryos are collected and transferred immediately to recipients or frozen for transfer later. As with A.I. embryo transfer allows individual superior parents to have many more offspring than normal and provides goat breeders with access to special animals. Embryo transfer is relatively more difficult and more costly than artificial insemination. Success rates are highly variable because of the many factors that can have an impact. Successful ET requires a skilled technician, and the average goat producer will not have the necessary skills to implement embryo transfer. In-vitro fertilization A developing technology that may make embryo transfer more flexible and cost-effective is invitro fertilization. Fertilization takes place in a test tube. Eggs are collected from donor females, then matured and fertilized in a laboratory. The resulting embryos can either be transferred immediately to recipients or frozen. There are two advantages of this technology: An increase in the number of pregnancies possible. Its potential for decreasing generation interval. The technology also requires substantially fewer sperm which would be an advantage if sperm were in short supply. 2
3 Sex control Generally speaking sex control is not a big issue for meat goat breeders. That is because both sexes have significant value. For dairy goat breeders, sex control means something because their preference is to have more does born to replace the milking stock in the herd. It is now possible to determine the sex of an embryo by physically removing a few cells and examining the chromosomes. It is possible to sort sperm carrying a male sex chromosome from sperm carrying a female sex chromosome. Sorting rates have been relatively slow but will increase as new technology is refined. The chief reason for sex control is an economic one, but the ability to know the sex of offspring ahead of time will affect selection and mating decisions. Cloning Cloning has significant potential for changing the way you breed meat goats. Herds could become clonal lines, that is, populations of highly select individual breeding goats with the genetic equivalent of identical twins. There are two ways to go about cloning, as described below: Embryo splitting is a relatively simple mechanical technique for cutting an embryo in half to produce twin embryos which can then be transferred to recipient does. It is a relatively slow process because only two identical offspring are produced. It does however increase the efficiency of embryo transfer. Recently developed techniques can create up to about 8 new embryos to be produced from one original. Nuclear transplantation is an entirely different technology. Eggs are matured in vitro, and their nuclei are removed surgically. Then individual cells from a multicell embryo are inserted in each egg, producing a number of identical embryos. The embryos can then be transferred immediately or frozen for use later. In meat goats you might want maternaltype clones for dams and a different type of clone for market animals. If hybrid vigor is substantial, clones could be crossbred all F 1 s. o o Originally, the evidence suggested that goats could be cloned only from undifferentiated embryonic tissue. That would be tissue that had not yet been modified to perform the functions of specific cell types, e.g. muscle cells, liver cells, bone cells, etc. It is now known, based on Dolly evidence, that clones can be created from adult tissue. This is a key breakthrough because it means you can clone goats that are already proven in production. The cloning cycle will be much shorter. Further discussions and detail go beyond the scope of this training module, but many good technical references are available. 3
4 Same-sex mating This represents another reproductive technology with implications for meat goat breeding and improvement. Using nuclear transplantation, embryo transfer, and nuclear fusion it is at least theoretically possible to create individual offspring whose parents are both male, or both female. It may never become possible, but the genetic rationale for it is to increase the rate of genetic change by increasing accuracy or selection and selection intensity. Conservation genetics Without genetic variation there is no possibility of sustained genetic improvement. Genetic diversity is critical in populations are to adapt to changing economic or production environments. The current increasing emphasis on uniformity in large populations in controlled production environments tend to result in a loss of genetic diversity. Alleles that may be important in a changed production environment may become extremely rare of even lost if steps are not taken to preserve the breeds and types of animals that are their reservoir. Conservation genetics is the branch of genetics dedicated to preserving germplasm. Evidence from laboratory animals and plants suggests that breeds or lines that are not currently considered competitive in the existing production environment may still harbor potentially useful alleles that are not found elsewhere. It is expensive to maintain live populations of less profitable animals and we can not depend on wealthy or dedicated benefactors to take up the cause in every case. One way to conserve these alleles is to insert them, via crossbreeding, into the more profitable types of stock and thus holding them there. Another option is to identify and take proactive steps to store the alleles in the form of sperm, eggs, embryos and live animals as is being done under the National Animal Germplasm Program at the USDA/ARS/National Center for Genetic Resources Preservation on the campus of Colorado State University. Several goat types and breeds are part of that ongoing program. Molecular technologies While reproductive technologies focus on the sperm, egg or embryo, molecular technologies go a step deeper into the body system and operate at the level of individual genes segments of strands of deoxyribonucleic acid (DNA). Here are just a few molecular technologies that are likely to influence meat goat breeding now and in the future. DNA fingerprinting for animal identification Even on well-managed and well-organized meat goat farms there can be mistakes made in parentage. DNA fingerprints appear graphically in a form that remind us of the bar codes for pricing merchandise. The pattern of bands represents the presence of specific alleles at a number of loci. DNA fingerprinting has implication for the management of pedigree populations in that paternity can be settled once and for all. From a genetic standpoint, the major benefit of DNA fingerprinting would be an increase in accuracy of selection. Sires are often misidentified and the faulty pedigrees cause genetic predictions to be less reliable, especially for young sires with few progeny data. For meat goat breeders who must use multiple-sire pastures could identify sires 4
5 through fingerprinting, the amount of genetically useful information would increase dramatically. This technology can be used to decrease the time required for a population to achieve purebred status in grading-up programs or in programs of repeated backcrossing to import an allele. Why is this? Because of segregation of alleles. It causes the actual breed composition of any particular individual in a new population, to vary away from the average. At the cellular level some individuals may have inherited up to 90% of their alleles may derive from one parent rather than the other. Fingerprinting can identify those individual that have the more desirable gene composition. It has potential for predicting hybrid vigor for a particular cross. Hybrid vigor is greater when the parent breeds are more distantly related. Marker assisted selection for polygenic traits Marker assisted selection uses genetic markers which are a detectable gene or DNA fragment to identify alleles at a linked locus, i.e. alleles on the same chromosome. It is likely to be more difficult with polygenic traits however, than for simply-inherited traits. There are several problems, but one major challenge in selection for polygenic traits is that differences in performance caused by any single gene may be too small to detect. No single one will have overriding effects on the trait. Still, some geneticists believe that some quantitative traits may be controlled through quantitative trait loci (QTLs) which can be detected. An example is the Boorolla gene for fecundity in sheep; a major gene controlling a quantitative trait. Gene transfer and transgenic goats Much of the interest in gene transfer comes from its potential for creation of products to be used in human or animal disease therapies; especially through a product such as milk, which can be harvested on a daily basis. In the area of animal breeding, gene transfer could be a tool for increasing genetic variation within populations. Gene transfer is a long way from commercial application. Success rates are poor and the procedures are very expensive. Transferring genes is made complex because the structural parts of genes depend on regulatory parts to function correctly. Sometimes they depend on entirely different genes for proper regulation. Several different parts, and in some cases different genes must be transferred. Gene transfer and many other molecular techniques have been more successful in plants than in animals in recent years. That may be because many important traits in plants are simply-inherited and simply-regulated. Their biological mechanisms are less complex. Nonetheless, a recent example includes the insertion of a gene in the goat genome which results in spidersilk being produced in goat milk. Chimeraism Occasionally one may be asked about the possibility of creating a goat x sheep chimera, sometimes known as a geep or a shoat (not to be confused with a young pig). A chimera is an animal which has at least two different populations of cells, that are genetically distinct, and which originated in different fertilized eggs. The name comes from the mythological creature Chimera which was said to be made out of three different creatures: lion, goat and serpent.. Chimeras are artificially produced by mixing cells from two different organisms. About 20 years 5
6 ago there was the report of such a sheep x goat mix that was produced by combining embryos for each species. Pictures were taken for verification, but it was not viable, and remains something of laboratory lore. Summary In a world surrounded by biotechnology and futuristic concepts, the beauty of traditional selection is that it allows only fully functional animals, animals with working genes and gene combinations, to survive and reproduce. Information contained in this document is part of a web-based training and certification program for meat goat producers ( that was developed with funding received by Langston University from USDA/FSIS/OPHS project #FSIS-C entitled "Development of a Web-based Training and Certification Program for Meat Goat Producers." Collaborating institutions/organizations include Alcorn State University, American Boer Goat Association, American Kiko Goat Association, American Meat Goat Association, Florida A&M University, Fort Valley State University, Kentucky State University, Langston University, Prairie View A&M University, Southern University, Tennessee Goat Producers Association, Tennessee State University, Tuskegee University, United States Boer Goat Association, University of Arkansas Pine Bluff, and Virginia State University. 6
Reproductive technologies. Lecture 15 Introduction to Breeding and Genetics GENE 251/351 School of Environment and Rural Science (Genetics)
Reproductive technologies Lecture 15 Introduction to Breeding and Genetics GENE 251/351 School of Environment and Rural Science (Genetics) Animal Breeding in a nutshell Breeding objectives Trait measurement
More informationANP 504 : ARTIFICIAL INSEMINATION COURSE LECTURERS
ANP 504 : ARTIFICIAL INSEMINATION COURSE LECTURERS DR. A. O. LADOKUN DR. J. O. DR. J. A. DARAMOLA ABIONA COURSE OUTLINE PART I The Role of AI and Reproduction in Livestock Improvement 1. Advantages and
More informationUnderstanding Animal Reproduction Technology
Lesson 251c Understanding Animal Reproduction Technology Core Area. Animal Science Unit 250. Genetics and Breeding Topic 251. Fertilization California Academic Standard. Science Grades 9 through 12 Biology/Life
More informationUnit B: Understanding Animal Reproduction. Lesson 3: Understanding Animal Reproduction Technology
Unit B: Understanding Animal Reproduction Lesson 3: Understanding Animal Reproduction Technology Student Learning Objectives: Instruction in this lesson should result in students achieving the following
More informationDNA Fingerprinting. Unless they are identical twins, individuals have unique DNA
DNA Fingerprinting Unless they are identical twins, individuals have unique DNA DNA fingerprinting The name used for the unambiguous identifying technique that takes advantage of differences in DNA sequence
More informationProceedings, Applied Reproductive Strategies in Beef Cattle September 11 and 12, 2007, Billings, Montana NEW TECHNOLOGIES FOR REPRODUCTION IN CATTLE
Proceedings, Applied Reproductive Strategies in Beef Cattle September 11 and 12, 2007, Billings, Montana NEW TECHNOLOGIES FOR REPRODUCTION IN CATTLE George E. Seidel, Jr. Animal Reproduction and Biotechnology
More informationPRODUCERS can choose to use natural
Artificial Insemination PRODUCERS can choose to use natural or artificial means of breeding their animals. Technology has advanced in the last 30 to 40 years to allow animal producers to use means other
More informationOverview of Artificial Insemination of Kentucky Meat and Dairy Goats Terry Hutchens, Extension Associate University of Kentucky (G10307)
Overview of Artificial Insemination of Kentucky Meat and Dairy Goats Terry Hutchens, Extension Associate University of Kentucky (G10307) General Prospective Kentucky goat producers can make great strides
More informationClass Time: 30 minutes. Other activities in the Stem Cells in the Spotlight module can be found at: http://gslc.genetics.utah.edu/teachers/tindex/
Teacher Guide: Color-Label-Learn: Creating Stem Cells for Research ACTIVITY OVERVIEW Abstract: Students color and label images on a worksheet and answer questions about the on-line content featured in
More informationA POWERFUL IN VITRO FERTILIZATION
A POWERFUL During the past 50 years technological advances in the field of bovine reproduction have led to some dramatic changes in the way cattle look, reproduce, perform, and even taste. Artificial Insemination
More informationAnimal Pharming: The Industrialization of Transgenic Animals December 1999
Animal Pharming: The Industrialization of Transgenic Animals December 1999 Animal pharming, the process of using transgenic animals to produce human drugs, is staking its claim in a lucrative world market.
More informationBasics of Marker Assisted Selection
asics of Marker ssisted Selection Chapter 15 asics of Marker ssisted Selection Julius van der Werf, Department of nimal Science rian Kinghorn, Twynam Chair of nimal reeding Technologies University of New
More informationIntroductory genetics for veterinary students
Introductory genetics for veterinary students Michel Georges Introduction 1 References Genetics Analysis of Genes and Genomes 7 th edition. Hartl & Jones Molecular Biology of the Cell 5 th edition. Alberts
More informationAlison Van Eenennaam, Ph.D.
Is the Market Ready for Milk from Cloned Cows? 3/15/06 Alison Van Eenennaam, Ph.D. Cooperative Extension Specialist Animal Biotechnology and Genomics alvaneenennaam@ucdavis.edu ODI OUTLINE What is a clone?
More informationGENOMIC SELECTION: THE FUTURE OF MARKER ASSISTED SELECTION AND ANIMAL BREEDING
GENOMIC SELECTION: THE FUTURE OF MARKER ASSISTED SELECTION AND ANIMAL BREEDING Theo Meuwissen Institute for Animal Science and Aquaculture, Box 5025, 1432 Ås, Norway, theo.meuwissen@ihf.nlh.no Summary
More informationImpact of reproductive technologies on improved genetics in beef cattle
Impact of reproductive technologies on improved genetics in beef cattle JE Kinder 1, JM Osborne 1, ME Davis 1, ML Day 1 1 The Ohio State University, Department of Animal Sciences, Columbus, Ohio 43210,
More informationGenomic Selection in. Applied Training Workshop, Sterling. Hans Daetwyler, The Roslin Institute and R(D)SVS
Genomic Selection in Dairy Cattle AQUAGENOME Applied Training Workshop, Sterling Hans Daetwyler, The Roslin Institute and R(D)SVS Dairy introduction Overview Traditional breeding Genomic selection Advantages
More informationThe impact of genomic selection on North American dairy cattle breeding organizations
The impact of genomic selection on North American dairy cattle breeding organizations Jacques Chesnais, George Wiggans and Filippo Miglior The Semex Alliance, USDA and Canadian Dairy Network 2000 09 Genomic
More informationRecommended Resources: The following resources may be useful in teaching this
Unit B: Anatomy and Physiology of Poultry Lesson 4: Artificial Poultry Reproduction Student Learning Objectives: Instruction in this lesson should result in students achieving the following objectives:
More informationBio EOC Topics for Cell Reproduction: Bio EOC Questions for Cell Reproduction:
Bio EOC Topics for Cell Reproduction: Asexual vs. sexual reproduction Mitosis steps, diagrams, purpose o Interphase, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis Meiosis steps, diagrams, purpose
More informationBLUP Breeding Value Estimation. Using BLUP Technology on Swine Farms. Traits of Economic Importance. Traits of Economic Importance
Using BLUP Technology on Swine Farms Dr. John W. Mabry Iowa State University BLUP Breeding Value Estimation BLUP = Best Linear Unbiased Prediction Prediction of an animals genetic merit (BV) Unbiased means
More informationUpdate. Barb Glenn, Ph.D. Food & Agriculture Section. FASS Symposium
Animal Biotechnology Industry Update Barb Glenn, Ph.D. Managing Director, Animal Biotech Food & Agriculture Section FASS Symposium May 14, 2007 Industry Status Goal Snapshot, Priorities, Members Technology
More informationChapter 9 Patterns of Inheritance
Bio 100 Patterns of Inheritance 1 Chapter 9 Patterns of Inheritance Modern genetics began with Gregor Mendel s quantitative experiments with pea plants History of Heredity Blending theory of heredity -
More informationReproductive System & Development: Practice Questions #1
Reproductive System & Development: Practice Questions #1 1. Which two glands in the diagram produce gametes? A. glands A and B B. glands B and E C. glands C and F D. glands E and F 2. Base your answer
More informationDNA MARKERS FOR ASEASONALITY AND MILK PRODUCTION IN SHEEP. R. G. Mateescu and M.L. Thonney
DNA MARKERS FOR ASEASONALITY AND MILK PRODUCTION IN SHEEP Introduction R. G. Mateescu and M.L. Thonney Department of Animal Science Cornell University Ithaca, New York Knowledge about genetic markers linked
More informationGenetics Test Biology I
Genetics Test Biology I Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Avery s experiments showed that bacteria are transformed by a. RNA. c. proteins.
More informationChapter 23 Definitions of GMO/LMO and modern biotechnology. Three different definitions but the same legal interpretation?
Chapter 23 Definitions of GMO/LMO and modern biotechnology JAN HUSBY NORWEGIAN INSTITUTE OF GENE ECOLOGY (GENØK), TROMSØ, NORWAY Three different definitions but the same legal interpretation? There are
More informationANS 3319C Reproductive Physiology and Endocrinology Artificial Insemination in Cattle. Objectives. What are the advantages and disadvantages of AI?
ANS 3319C Reproductive Physiology and Endocrinology Artificial Insemination in Cattle Objectives 1) To provide an overview of the process of artificial insemination (AI) in cattle. 2) To gain an understanding
More informationREPRODUCTION AND BREEDING Crossbreeding Systems for Beef Cattle
Beef Cattle REPRODUCTION AND BREEDING Crossbreeding Systems for Beef Cattle Pete Anderson University of Minnesota Beef Team It has been well documented that crossbreeding improves performance of beef cattle.
More informationScience 10-Biology Activity 14 Worksheet on Sexual Reproduction
Science 10-Biology Activity 14 Worksheet on Sexual Reproduction 10 Name Due Date Show Me NOTE: This worksheet is based on material from pages 367-372 in Science Probe. 1. Sexual reproduction requires parents,
More informationChapter 13: Meiosis and Sexual Life Cycles
Name Period Chapter 13: Meiosis and Sexual Life Cycles Concept 13.1 Offspring acquire genes from parents by inheriting chromosomes 1. Let s begin with a review of several terms that you may already know.
More informationGenetics for the Novice
Genetics for the Novice by Carol Barbee Wait! Don't leave yet. I know that for many breeders any article with the word genetics in the title causes an immediate negative reaction. Either they quickly turn
More informationEvaluations for service-sire conception rate for heifer and cow inseminations with conventional and sexed semen
J. Dairy Sci. 94 :6135 6142 doi: 10.3168/jds.2010-3875 American Dairy Science Association, 2011. Evaluations for service-sire conception rate for heifer and cow inseminations with conventional and sexed
More informationChapter 13: Meiosis and Sexual Life Cycles
Name Period Concept 13.1 Offspring acquire genes from parents by inheriting chromosomes 1. Let s begin with a review of several terms that you may already know. Define: gene locus gamete male gamete female
More informationAssignment Discovery Online Curriculum
Assignment Discovery Online Curriculum Lesson title: In Vitro Fertilization Grade level: 9-12, with adaptation for younger students Subject area: Life Science Duration: Two class periods Objectives: Students
More informationInheritance of Color And The Polled Trait Dr. R. R. Schalles, Dept. of Animal Sciences and Industry Kansas State University
Inheritance of Color And The Polled Trait Dr. R. R. Schalles, Dept. of Animal Sciences and Industry Kansas State University Introduction All functions of an animal are controlled by the enzymes (and other
More informationStem Cell Quick Guide: Stem Cell Basics
Stem Cell Quick Guide: Stem Cell Basics What is a Stem Cell? Stem cells are the starting point from which the rest of the body grows. The adult human body is made up of hundreds of millions of different
More informationGuidance For Research Involving Human Embryonic Stem Cells, Germ Cells, And Cells Obtained From Cord Blood
Guidance For Research Involving Human Embryonic Stem Cells, Germ Cells, And Cells Obtained From Cord Blood Supreme Council of Health Department of Research Guidance Regarding Research Involving Human Embryonic
More informationDr. G van der Veen (BVSc) Technical manager: Ruminants gerjan.vanderveen@zoetis.com
Dr. G van der Veen (BVSc) Technical manager: Ruminants gerjan.vanderveen@zoetis.com GENETICS NUTRITION MANAGEMENT Improved productivity and quality GENETICS Breeding programs are: Optimize genetic progress
More informationMeiosis is a special form of cell division.
Page 1 of 6 KEY CONCEPT Meiosis is a special form of cell division. BEFORE, you learned Mitosis produces two genetically identical cells In sexual reproduction, offspring inherit traits from both parents
More informationTerms: The following terms are presented in this lesson (shown in bold italics and on PowerPoint Slides 2 and 3):
Unit B: Understanding Animal Reproduction Lesson 4: Understanding Genetics Student Learning Objectives: Instruction in this lesson should result in students achieving the following objectives: 1. Explain
More informationArtificial Insemination in Cattle
Artificial Insemination in Cattle Introduction This slide show is designed to introduce students to artificial insemination in cattle. However, it is only a brief overview and further training is necessary
More informationSexual Reproduction. The specialized cells that are required for sexual reproduction are known as. And come from the process of: GAMETES
Sexual Reproduction Sexual Reproduction We know all about asexual reproduction 1. Only one parent required. 2. Offspring are identical to parents. 3. The cells that produce the offspring are not usually
More informationLONDON REGIONAL TRANSGENIC AND GENE TARGETING FACILITY
LONDON REGIONAL TRANSGENIC AND GENE TARGETING FACILITY SPERM CRYOPRESERVATION AND IN VITRO FERTILIZATION RESOURCE PACKAGE For information, contact: Dr. Christopher Pin, PhD, Scientific Director London
More informationBiology 1406 - Notes for exam 5 - Population genetics Ch 13, 14, 15
Biology 1406 - Notes for exam 5 - Population genetics Ch 13, 14, 15 Species - group of individuals that are capable of interbreeding and producing fertile offspring; genetically similar 13.7, 14.2 Population
More informationEVERY LIVING THING has a number of
Anatomy and Physiology of Animal Reproductive Systems EVERY LIVING THING has a number of organ systems operating to perform specific functions. If you were to examine one of these systems, you would observe
More informationBasic Concepts Recombinant DNA Use with Chapter 13, Section 13.2
Name Date lass Master 19 Basic oncepts Recombinant DN Use with hapter, Section.2 Formation of Recombinant DN ut leavage Splicing opyright lencoe/mcraw-hill, a division of he Mcraw-Hill ompanies, Inc. Bacterial
More informationVon Mäusen und Menschen E - 1
Von Mäusen und Menschen E - 1 Mus musculus: Genetic Portrait of the House Mouse E - 3 Outline Mouse genome Mouse life cycle Transgenic protocols Addition of genes by nuclear injection Removal of genes
More informationGenetics Module B, Anchor 3
Genetics Module B, Anchor 3 Key Concepts: - An individual s characteristics are determines by factors that are passed from one parental generation to the next. - During gamete formation, the alleles for
More informationBiology Behind the Crime Scene Week 4: Lab #4 Genetics Exercise (Meiosis) and RFLP Analysis of DNA
Page 1 of 5 Biology Behind the Crime Scene Week 4: Lab #4 Genetics Exercise (Meiosis) and RFLP Analysis of DNA Genetics Exercise: Understanding how meiosis affects genetic inheritance and DNA patterns
More informationThe All-Breed Animal Model Bennet Cassell, Extension Dairy Scientist, Genetics and Management
publication 404-086 The All-Breed Animal Model Bennet Cassell, Extension Dairy Scientist, Genetics and Management Introduction The all-breed animal model is the genetic-evaluation system used to evaluate
More informationBeef Cattle Handbook
Beef Cattle Handbook BCH-1000 Product of Extension Beef Cattle Resource Committee Adapted from Beef Improvement Federation Beef Performance Glossary John Hough, Amercian Hereford Association David Notter,
More informationGenomic selection in dairy cattle: Integration of DNA testing into breeding programs
Genomic selection in dairy cattle: Integration of DNA testing into breeding programs Jonathan M. Schefers* and Kent A. Weigel* *Department of Dairy Science, University of Wisconsin, Madison 53706; and
More informationTech Prep Articulation
Tech Prep Articulation Agriculture & Natural Resources Tech Prep Education: Tech Prep education in Missouri is an articulated two-year secondary and two or more year post-secondary education program which:
More informationguides BIOLOGY OF AGING STEM CELLS An introduction to aging science brought to you by the American Federation for Aging Research
infoaging guides BIOLOGY OF AGING STEM CELLS An introduction to aging science brought to you by the American Federation for Aging Research WHAT ARE STEM CELLS? Stem cells are cells that, in cell cultures
More informationThe Developing Person Through the Life Span 8e by Kathleen Stassen Berger
The Developing Person Through the Life Span 8e by Kathleen Stassen Berger Chapter 3 Heredity and Environment PowerPoint Slides developed by Martin Wolfger and Michael James Ivy Tech Community College-Bloomington
More informationName: Class: Date: ID: A
Name: Class: _ Date: _ Meiosis Quiz 1. (1 point) A kidney cell is an example of which type of cell? a. sex cell b. germ cell c. somatic cell d. haploid cell 2. (1 point) How many chromosomes are in a human
More informationStaying good while playing God Looking after animal welfare when applying biotechnology
Staying good while playing God Looking after animal welfare when applying biotechnology Peter Sandøe, Stine B. Christiansen and Christian Gamborg University of Copenhagen Animal breeding was, until the
More informationBOER GOAT EMBRYO TRANSFER
BOER GOAT EMBRYO TRANSFER Good management No shortcuts PLAN AHEAD AVOID STRESS Some examples of how stress is induced are: Mixing groups or individual animals together that have not previously been together.
More informationCHAPTER 15 THE CHROMOSOMAL BASIS OF INHERITANCE. Section B: Sex Chromosomes
CHAPTER 15 THE CHROMOSOMAL BASIS OF INHERITANCE Section B: Sex Chromosomes 1. The chromosomal basis of sex varies with the organism 2. Sex-linked genes have unique patterns of inheritance 1. The chromosomal
More informationSTRATEGIES FOR DAIRY CATTLE BREEDING TO ENSURE SUSTAINABLE MILK PRODUCTION 1
STRATEGIES FOR DAIRY CATTLE BREEDING TO ENSURE SUSTAINABLE MILK PRODUCTION 1 Prof. Ntombizakhe Mpofu Department of Agricultural Sciences, Lupane State University, P O Box AC 255, Bulawayo Tel: 09-883830/40;
More informationTrasposable elements: P elements
Trasposable elements: P elements In 1938 Marcus Rhodes provided the first genetic description of an unstable mutation, an allele of a gene required for the production of pigment in maize. This instability
More informationAn Introduction to Artificial Insemination
A New Way to Your Dream Dog An Introduction to Artificial Insemination Contents of the brochure What does artificial insemination mean?... 4 Advantages of artificial insemination... 5 What does artificial
More informationwww.njctl.org PSI Biology Mitosis & Meiosis
Mitosis and Meiosis Mitosis Classwork 1. Identify two differences between meiosis and mitosis. 2. Provide an example of a type of cell in the human body that would undergo mitosis. 3. Does cell division
More informationGoat Program at Langston University Web site www2.luresext.edu Research Nutrient Requirements Vegetative Mgt Internal Parasites Quarterly newsletter F
Build a Comprehensive Management Plan Steve Hart Langston University Goat Program at Langston University Web site www2.luresext.edu Research Nutrient Requirements Vegetative Mgt Internal Parasites Quarterly
More informationCourse: AG 534 Zoology - Science of Animal Reproduction
Course: AG 53 Zoology - Science of Animal Reproduction Unit Objective CAERT Lesson Plan Library Unit Problem Area Les son Animal. Plant & Soil Science 1 1,2, 3 Introduction to Animal Science Match terms
More informationvision evolving guidelines
vision To foster a collective, industry supported strategy for the future of the Holstein Breed which will act as a tool for Canadian dairy producers to maximize profitability and genetic improvement.
More informationHeadquarters in Sioux Center, IA 1
Nicholas Lemmel Cornfields, soybeans, and cows, I had finally arrived at Trans Ova Genetics Headquarters in Sioux Center, Iowa. I pulled into the drive of the intern house located on the corner of the
More informationMajor Advances in Globalization and Consolidation of the Artificial Insemination Industry
J. Dairy Sci. 89:1362 1368 American Dairy Science Association, 2006. Major Advances in Globalization and Consolidation of the Artificial Insemination Industry D. A. Funk ABS Global, Inc., DeForest, WI
More informationAssisted Reproductive Technologies at IGO
9339 Genesee Avenue, Suite 220 San Diego, CA 92121 858 455 7520 Assisted Reproductive Technologies at IGO Although IGO no longer operates an IVF laboratory or program as such, we work closely with area
More informationReplacement Heifers Costs and Return Calculation Decision Aids
Replacement Heifers Costs and Return Calculation Decision Aids The purpose of these replacement heifer cost decision aids is to calculate total production costs and return on investment (ROI) to evaluate
More informationIVF OVERVIEW. Tracy Telles, M.D.
IVF OVERVIEW By Tracy Telles, M.D. Dr. Hendler: Hello and welcome to KP Healthcast. I m your host Dr. Peter Hendler and today our guest is Dr. Tracy Telles. Dr. Telles is an IVF physician in Kaiser Walnut
More informationIn Vitro Fertilization as a tool for the Genetics Improvement. History and Future Prospects.
In Vitro Fertilization as a tool for the Genetics Improvement. History and Future Prospects. Ovum pick up followed by embryo production procedure (OPU-IVP) is strongly driven by the need of the breeding
More informationCell Growth and Reproduction Module B, Anchor 1
Cell Growth and Reproduction Module B, Anchor 1 Key Concepts: - The larger a cell becomes, the more demands the cell places on its DNA. In addition, a larger cell is less efficient in moving nutrients
More informationGCSE BITESIZE Examinations
GCSE BITESIZE Examinations General Certificate of Secondary Education AQA SCIENCE A BLY1B Unit Biology B1b (Evolution and Environment) AQA BIOLOGY Unit Biology B1b (Evolution and Environment) FOUNDATION
More informationSummary. 16 1 Genes and Variation. 16 2 Evolution as Genetic Change. Name Class Date
Chapter 16 Summary Evolution of Populations 16 1 Genes and Variation Darwin s original ideas can now be understood in genetic terms. Beginning with variation, we now know that traits are controlled by
More informationAct of 5 December 2003 No. 100 relating to the application of biotechnology in human medicine, etc
Act of 5 December 2003 No. 100 relating to the application of biotechnology in human medicine, etc Cf. earlier Acts of 5 August 1994 No. 56 and 12 June 1987 No. 68 Chapter 1. Purpose and scope 1-1. Purpose
More informationCCR Biology - Chapter 9 Practice Test - Summer 2012
Name: Class: Date: CCR Biology - Chapter 9 Practice Test - Summer 2012 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Genetic engineering is possible
More informationMCB41: Second Midterm Spring 2009
MCB41: Second Midterm Spring 2009 Before you start, print your name and student identification number (S.I.D) at the top of each page. There are 7 pages including this page. You will have 50 minutes for
More information"Fingerprinting" Vegetables DNA-based Marker Assisted Selection
"Fingerprinting" Vegetables DNA-based Marker Assisted Selection Faster, Cheaper, More Reliable; These are some of the goals that vegetable breeders at seed companies and public institutions desire for
More informationFAQs: Gene drives - - What is a gene drive?
FAQs: Gene drives - - What is a gene drive? During normal sexual reproduction, each of the two versions of a given gene has a 50 percent chance of being inherited by a particular offspring (Fig 1A). Gene
More informationPractical Sheep Breeding
Practical Sheep Breeding Introduction Hybu Cig Cymru/Meat Promotion Wales (HCC) was established in April 2003 and is the strategic body for the promotion and development of the Welsh red meat industry.
More informationAbortion and Stem Cell Debate Background Information
Abortion and Stem Cell Debate Background Information 1 Fetal Development 2 Terms Syngamy: fusion of two gametes in fertilization Zygote: name of the cell resulting from fertilization until it implants
More information7A The Origin of Modern Genetics
Life Science Chapter 7 Genetics of Organisms 7A The Origin of Modern Genetics Genetics the study of inheritance (the study of how traits are inherited through the interactions of alleles) Heredity: the
More informationWorksheet - COMPARATIVE MAPPING 1
Worksheet - COMPARATIVE MAPPING 1 The arrangement of genes and other DNA markers is compared between species in Comparative genome mapping. As early as 1915, the geneticist J.B.S Haldane reported that
More informationFour Systematic Breeding Programs with Timed Artificial Insemination for Lactating Dairy Cows: A Revisit
Four Systematic Breeding Programs with Timed Artificial Insemination for Lactating Dairy Cows: A Revisit Amin Ahmadzadeh Animal and Veterinary Science Department University of Idaho Why Should We Consider
More informationTraining manual for embryo transfer in cattle
FAO ANIMAL PRODUCTION AND HEALTH PAPER 77 Training manual for embryo transfer in cattle Contents by George E. Seidel, Jr and Sarah Moore Seidel Animal Reproduction Laboratory, Colorado State University,
More informationHuman Cloning The Science and Ethics of Nuclear Transplantation
Human Cloning The Science and Ethics of Transplantation Rudolf Jaenisch, M.D. In addition to the moral argument against the use of somatic-cell nuclear for the creation of a child ( reproductive cloning
More informationBeef Cattle Breeds and Biological Types Scott P. Greiner, Extension Animal Scientist, Virginia Tech
publication 400-803 Beef Cattle Breeds and Biological Types Scott P. Greiner, Extension Animal Scientist, Virginia Tech Worldwide there are more than 250 breeds of beef cattle. Over 60 of these breeds
More informationArtificial Insemination (AI) in Cattle
Artificial Insemination (AI) in Cattle Most dairy cows are bred by AI Less common in beef cattle Commonly, bulls are used for all breeding under pasture conditions Less commonly, bulls are used as clean-up
More informationChapter 16 Reproductive Technology, Gene Therapy, and Stem Cells (modified)
Chapter 16 Reproductive Technology, Gene Therapy, and Stem Cells (modified) Assisted Reproductive Technologies (ART) Artificial insemination (AI) In vitro fertilization (IVF) Gamete intrafallopian transfer
More informationHeredity - Patterns of Inheritance
Heredity - Patterns of Inheritance Genes and Alleles A. Genes 1. A sequence of nucleotides that codes for a special functional product a. Transfer RNA b. Enzyme c. Structural protein d. Pigments 2. Genes
More informationPractice Questions 1: Evolution
Practice Questions 1: Evolution 1. Which concept is best illustrated in the flowchart below? A. natural selection B. genetic manipulation C. dynamic equilibrium D. material cycles 2. The diagram below
More informationPreimplantation genetic diagnosis new method of screening of 24 chromosomes with the Array CGH method...2
August 2012 content 8 Preimplantation genetic diagnosis new method of screening of 24 chromosomes with the Array CGH method...2 Maintaining fertility new opportunities in GENNET...3 Hysteroscopy without
More informationBlue Print III Biology. Class XII. Genetics and Evolution 2 (2) 4 (2) 9 (3) 5 (1) 20 (8) Types of Questions VSA SA II SA I LA Total
Blue Print III Biology Class XII Types of Questions VSA SA II SA I LA Total Units (1 mark) ( marks) (3 marks) (5 marks) - Sexual Reproduction () 4 () 6 () _ 1 (6) Genetics and Evolution () 4 () 9 (3) 5
More informationMarker-Assisted Backcrossing. Marker-Assisted Selection. 1. Select donor alleles at markers flanking target gene. Losing the target allele
Marker-Assisted Backcrossing Marker-Assisted Selection CS74 009 Jim Holland Target gene = Recurrent parent allele = Donor parent allele. Select donor allele at markers linked to target gene.. Select recurrent
More informationMINISTRY OF LIVESTOCK DEVELOPMENT SMALLHOLDER DAIRY COMMERCIALIZATION PROGRAMME. Artificial Insemination (AI) Service
MINISTRY OF LIVESTOCK DEVELOPMENT SMALLHOLDER DAIRY COMMERCIALIZATION PROGRAMME Artificial Insemination (AI) Service 1 1.0 Introduction The fertility of a dairy cattle is very important for a dairy farmer
More informationUnderstanding Fertility
Understanding Fertility 6 Introduction The word fertile means the ability to become pregnant or to cause pregnancy. Basic knowledge of both the male and female reproductive systems is important for understanding
More informationShould Stem Cells Be Used To Treat Human Diseases?
SAMPLE ESSAY C Should Stem Cells Be Used To Treat Human Diseases? Stem cells can be defined as undifferentiated cells that are generated during the development of the embryo. There are two functions ascribed
More information1. Why is mitosis alone insufficient for the life cycle of sexually reproducing eukaryotes?
Chapter 13: Meiosis and Sexual Life Cycles 1. Why is mitosis alone insufficient for the life cycle of sexually reproducing eukaryotes? 2. Define: gamete zygote meiosis homologous chromosomes diploid haploid
More information