Introduction to Activity 1. Biotechnology and You
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1 Introduction to Activity 1 Biotechnology and You
2 In this activity you will explore: Background Artificial selection versus genetic engineering - Use of genetic engineering to modify agricultural crops Economic, environmental and ethical considerations used when assessing GEO s File Number:
3 What is Artificial Selection? Selectively breeding organisms based on how they look (phenotype) This process used for 1000 s of years Examples types of dogs wild grass to corn File Number: REPLACE THIS TEXT WITH REPRINTED WITH PERMISSION BY...
4 What is Genetic Engineering? It is when you change the DNA directly It introduces new genes into an organism using gene splicing Techniques developed in mid-20 th Century File Number: File Number:
5 What are Controversies associated with Genetic Engineering? Ethical Religion Animal welfare Human health Environmental health Scientific Human health Environmental health File Number: Regulations
6 Large, Global Issue 75% of processed food in America derived from GEOs GEOs grown in over 20 countries worldwide
7 Part A: Artificial Selection Explore how artificial selection can result in phenotypic changes Model the act of artificial selection by playing the Bean Game
8 Examples of Genetic Modification List organisms that have been genetically modified by humans Which of the those organisms have been modified through artificial selection? Come up with a definition of aritificial selection
9 Activity: The Bean Game You will conduct an artificial selection experiment using beans The goal of the game is to end up with the largest beans after 10 rounds Each bean represents an allele for bean size Each round represents on life cycle for the bean
10 Reflection Questions In this activity, what did the beans represent? What did the process of adding new beans to your line represent? Why did you have to choose a pair of beans, rather than just a single bean? What are some ways in which this analogy did not accurately reflect real life? What was the trend in bean size after 5 rounds? 10 rounds? What would you predict would happen after 1000 or even 1000 rounds?
11 Part B: Genetic Engineering Explore the methods and application of genetic engineering File Number: Create a paper version of a genetically engineering organism
12 Uses of Genetic Engineering List types of organisms humans have modified using genetic engineering What is the difference between genetic engineering and artificial selection? Come up with a definition for genetic engineering and transgenic
13 Transgenic Crops What are some types of transgenic crops? What are the potential benefits of these crops? What are potential risks of these crops?
14 Transgenic versus Organic What is an organic crop? Can an organic crop be transgenic? Why would some farmers want to grow transgenic crops and others organic? Why would it be a problem if a transgenic crop mixed with an organic crop?
15 Activity: Glowing crops Two genes will be inserted into a particular crop Bt resistance gene Green Fluorescent Protein Gene What is a reporter gene? Which of the genes listed above is a reporter gene?
16 Transformation Basics Discover genes of interest (such as those for pest resistance, insulin production, fluoresance) Cut those genes out (using molecular scissors called restriction enzymes) Paste the genes into a plasmid (using molecular glue called ligase) Insert the plasmid into a new plant, where the new genes will create the trait of interest (such as producing proteins to protect against pests, make drugs or glow) gurl= pedia/commons/thumb/4/42/plasmi d_replication_(english).svg/400px- Plasmid_replication_(english).svg.p ng&imgrefurl= /wiki/plasmid&h=350&w=400&sz=9 4&hl=en&start=1&um=1&usg= ck bmdjzmp794ohogobuwyp_p5uu =&tbnid=nvsoopzrkrlsm:&tbnh=109&tbnw=124 &prev=/images%3fq%3dplasmid% 26um%3D1%26hl%3Den%26rlz%3 D1T4TSHB_enUS248US249
17 1. Begin with a plasmid and a gene (or genes) that you want to insert. 2. Cut the plasmid with a restriction enzyme. Plasmid Gene to be inserted 3. Cut the gene of interest with the same restriction enzyme to produce sticky ends. 4. Paste (ligate) the gene of interest into the plasmid.
18 How do restriction enzymes work? EcoR1 G A A T T C EcoR1 recognizes and cuts at the sequence "G A A T T C" C T T A A G HindIII A T A T G C C G T A T A HindIII recognizes and cuts at the sequence "A A G C T T" Pst1 C G T A G C C G A T G C Pst1 recognizes and cuts the sequence "C T G C A G"
19 How do restriction enzymes work? EcoR1 G A A T T C EcoR1 recognizes and cuts at the sequence "G A A T T C" C T T A A G HindIII A T A T G C C G T A T A HindIII recognizes and cuts at the sequence "A A G C T T" Pst1 C G T A G C C G A T G C Pst1 recognizes and cuts the sequence "C T G C A G"
20 What are sticky ends? Enzym e cuts The overhanging ends allow the plasmid to be pasted (ligated) into the plasmid. + =
21 Activity: Genetically Engineering a Plasmid A plasmid is a small, circular piece of DNA that is not located on chromosomes Plasmids are naturally exchanged among organisms They can be modified and used to deliver new pieces of DNA into an organism
22 Reflection Questions What molecular tools did the scissors and glue (or tape) represent? Why did you include a gene for both pest resitance AND fluoresance? Would it have been possible for only one of the genes (either the Bt gene or the GFP gene) to have been inserted into the crop? What are other types of genes that can be inserted into crops?
23 Part C: Risks and Benefits of Genetically Engineered Organisms Explore some of the perceived risks and benefits of GEOs Examine different perspectives and identify sources of bias
24 Risks Have you taken any risks today? What were they? Come up with a definition of risk File Number:
25 Activity: Identifying Risks and Benefits Read through your assigned student page Within your group, make a list of the risks and benefits identified on your student page Have one member of the group record your findings and then list them on the board
26 Bias What do you notice about the lists generated by the different groups? Why do you think the lists may have been different? Who do you think were the authors of each of the groups student pages? Come up with a definition for bias
27 Detecting Bias Suggest methods for detecting bias How did reading the 3 different perspectives affect your thoughts on the risks and benefits of genetic engineering? Which student page seemed least biased and why? Do you think that all industry, environmental or scientific organizations would hold identical opinions as those expressed in the student pages? Why or why not?
28 Part D: Case studies of Genetically Engineered Crops Identify different types of agricultural engineering Analyze risks and benefits associated with the different types of agricultural engineering File Number:
29 Genetically Engineered Organisms Have you even eaten a genetically engineering organism? How many of the crops grown in the US are genetically engineered? How would you know if the food you were eating was genetically engineered?
30 Types of Agricultural Engineering Nutritional Enhancement Herbicide Resistance Environmental Stressor Resistance
31 Risks and Benefits of Agricultural Engineering Potential Risks Harmful proteins Non-target Organisms Increased invasiveness Pest Resistance Impact on Biodiversity Potential Benefits Increased Yield/Nutrition/shelf life Decrease energy needed to produce crops Decreased use of pesticides Tolerance of severe environments Use for human health
32 Risk Management Strategies Use sterile plants Prevent seed dispersal Use non-food crops Use greenhouses Use phenotypic markers Label foods Regulatory requirements Harvest before mature
33 Reflection Questions Do you support genetic engineering in crops? Does your support vary depending on the category of agricultural engineering? Does your support of genetic engineering differ for the production of medicine? What about the creation of transgenic pets?
34 Part E: Issues of Containment Introduction to the regulation and control of transgenic plants Case study of Starlink Corn
35 Containment and Escape of Transgenes What does the word containment mean? What does the word escape mean? What types of things need to be contained? How and why are plants contained? Can plants escape?
36 Physical and Biological Containment What are the differences between physical and biological containment? Are physical and biological methods of containment mutually exclusive? Will one type of method be best for all types of plants? What are characteristics of plants that may influence containment methods?
37 Transgenes Escape to Taco Bell What is a transgene? What is a transgenic plant? What is the role of the Food and Drug Administration in regulating transgenic organisms?
38 Effects of the Starlink Corn Political Transgene Escape Economical Ecological Human Health
39 Policy Decisions How did the Taco Bell Starlink case affect policy? How should policy makers figure the possibility for human error into regulations? How does regulatory bodies handle unforeseeable consequences?
40 Part F: Genetically Engineered Organisms and Clothing Explore the uses of genetically engineering cotton in today s society Identify the reasons clothing manufacturers choose to produce products from non-genetically engineered organisms
41 Genetically Engineered Cotton What are the two most common reasons cotton is genetically engineered? Are clothes made from genetically engineered cotton required to be labeled as such? What is the definition of organic?
42 Questions What are the reasons that clothing manufacturers give for using organic cotton? Are the companies opinions supported by facts? Are there are flaws in the arguments for the use of organic cotton presented by companies? What would the economic impact be if all cotton sold was organic? Did the information from your classmate s advertisement change your view on genetically engineered cotton? Why or why not?
43 Extra picutres I many use File Number: File Number: File Number: File Number:
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