Biology Heredity Blizzard Bag 2014-2015 Copyright 2014 Edmentum - All rights reserved. 1. Many serious diseases can be passed from parent to offspring through genes. In which case given below is a recessive disease NOT able to be passed on? A. if one parent has both alleles for the disease only B. if one parent has one allele or has no alleles for the disease C. if one parent has zero, one, or both alleles for the disease D. if one parent has no alleles for the disease 2. Skin color in humans is an example of a phenotypic trait that is determined by polygenic inheritance. Three separate gene loci determine skin color (P, Q and R), where each gene locus has an additive effect on skin color and the capital letters represent incompletely dominant alleles producing dark skin. What fraction of the children of a medium-toned (PpQqRr) mother and medium-toned (PpQqRr) father would exhibit the lightest possible skin color(genotype: ppqqrr)? A. 1 /4 B. 1 /24 C. 1 /8 D. 1 /64
3. In pea plants, tall (T) plants are dominant over short (t) plants. If a heterozygous (Tt) pea plant is crossed with a homozygous dominant (TT) pea plant, all of the resulting pea plants should be tall (TT or Tt). Each plant will receive a dominant allele from the homozygous dominant plant, while they could receive either a dominant or recessive allele from the heterozygous plant. The fact that each plant gets only one allele from each parent plant is detailed in the Law of. A. Genetic Inheritance B. Multiple Alleles C. Segregation D. Independent Assortment 4. Which hereditary rule explains why a self-fertilizing parent that is heterozygous for the A locus (Aa) can produce offspring that are AA or aa? A. dominance B. principle of segregation C. codominance D. principle of independent assortment 5. A student crosses two true-breeding pea plants, one with green pods and the other with yellow pods. If yellow is dominant over green, what phenotypic results will the student find in the F1 generation? A. 25% yellow, 75% green B. 100% green C. 100% yellow D. 50% green, 50% yellow
6. Punnett squares depict the genotypes of two parents and are used to predict the inherited traits of offspring. Which of the following would be the missing predicted trait in the table below? A. OO B. AO C. AA D. OA 7. Human height is a polygenic trait. This means that the A. trait is controlled by the genes inherited from the father only. B. trait is completely controlled by only one pair of genes. C. trait is controlled by the genes inherited from the mother only. D. trait is controlled by more than one pair of genes. 8. A(n) is a characteristic arising from genes located on gender-determining chromosomes. A. autosomal trait B. genotype C. allele D. sex-linked trait 9. A mother with A blood type and a father with B blood type produce a baby with AB blood type. This is an example of A. codominance. B. a genetic mutation. C. an autosomal recessive gene. D. incomplete dominance.
10. Carla receives an allele for blue eyes from her mother, and an allele for brown eyes from her father. If brown eye color is a dominant trait and blue eye color is a recessive trait, what can be determined about the color of Carla's eyes? A. Carla's eye color can not be determined. B. Carla has blue eyes. C. Carla has brown eyes. D. Carla has green eyes. 11. Infantile Tay-Sachs is a fatal disease caused by a recessive allele passed from parents to offspring. Jennifer had a baby brother who died of Infantile Tay-Sachs disease (TSD), but Jennifer did not have the disease. When she grew up and got married, her third child also died of Infantile TSD. How is this possible? A. Jennifer's husband had the disease, and Jennifer did not have any alleles. B. Jennifer and her husband were both carriers of the allele. C. Jennifer's husband was a carrier of the allele for the disease, and Jennifer was not. D. Jennifer was a carrier of the allele for the disease, and her husband had the disease. 12. A healthy woman gives birth to a baby with infantile Tay-Sachs disease. She is surprised by this diagnosis because she does not remember meeting anyone in her family with this disease. What is the most likely explanation for this diagnosis given that infantile Tay-Sachs disease is an autosomal recessive trait? A. The baby acquired the disease during delivery. B. The baby's DNA spontaneously mutated. C. A distant relative that the mother never met had the disease. D. The father suffers from Tay-Sachs disease.
13. Trey goes to a rabbit farm to look at a litter of newborn rabbits. The newborns are all different colors. They are gray, black, white, light brown, and dark brown. What type of inheritance pattern are these rabbits likely displaying? A. dominant-recessive B. incomplete dominance C. codominance D. multiple alleles 14. The pedigree shown above is based on a family with freckles (filled circles or squares) or lacking freckles (empty circles or squares). Freckles are determined by one gene locus. Which of the following statements about freckles is most likely to be correct? A. Freckles are a sex-linked recessive allele. B. Freckles are an autosomal recessive allele. C. Freckles are a sex-linked dominant allele. D. Freckles are an autosomal dominant allele. 15. A student crosses two pea plants. One is homozygous dominant for axial flowers, and the other is heterozygous for axial flowers. If the student examines 200 offspring pea plants, which of the following is a reasonable result? A. 47 with axial flowers, 153 with terminal flowers B. 149 with axial flowers, 51 with terminal flowers C. 200 with axial flowers, 0 with terminal flowers D. 98 with axial flowers, 102 with terminal flowers