Question 1. In a population of rabbits, assume that the allele for black fur (B) is dominant and the allele for brown fur (b) is recessive. Answer the following: What is the allele combination for a black (heterozygous) male? What is the allele combination for a brown (homozygous) female? Use the Punnett square example in the module as a template. If this male breeds with this female, what is the % probability of obtaining a brown offspring. Question 2. Consider a population of rabbits that is strictly isolated from all other rabbits and does not undergo any genetic mutation. Answer the following (Note: use the equations in the "Effect of Genetic Drift" section of the module): If the effective population size is 40 individuals, what is the heterozygosity of this population after one generation? What is the heterozygosity of this population after 15 generations?
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Step 1: The allele combination for a black (heterozygous) male is Bb. Show more…
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In rabbits, the dominant allele "B" causes black fur and the recessive allele "b" causes brown fur. For an independently assorting gene, the dominant allele "S" causes short fur and the recessive allele "s" causes long fur. A heterozygous black rabbit with short fur (heterozygous for both genes) is crossed to a homozygous (for both genes) black rabbit with long fur. (A) What are the genotypes of the parents? (B) Using a single Punnett square, determine the proportion of the F1 offspring that will have long, black fur. (C) Using a branch diagram, determine the proportion of F1 offspring that will have short, black fur. (D) Is it possible to get brown rabbits in this cross? If yes, in what proportion? If not, explain why.
Bryan V.
11. Rabbits can have dotted or solid coats, and the base color can be either black or brown. Dotted coat color is dominant to solid, and black is dominant to brown. What would be the genotype of a female dotted brown rabbit whose mother was solid black? What would be the genotype of a male dotted brown rabbit whose parents were homozygous for the dotted coat allele? Which kind of gametes would be produced by the dotted brown rabbit in question a? Which kind of gametes would be produced by the dotted brown rabbit in question b? Draw patterns square showing the mating of the pair of rabbits from question a and b.
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Questions $23-25$ In a certain population of rabbits in the midwestern United States, there are two alleles for coat color, brown and white. Brown is dominant, and white is recessive. The frequency of white-colored rabbits is 9$\% .$ Wolves are also present in the area, and rabbits constitute a major portion of their diet. Foxes recognize prey when they do not blend in to the environment. What is the frequency of the allele for brown coat color in the rabbits? (A) 0.09 (B) 0.03 (C) 0.3 (D) 0.7 (E) 0.9
SAMPLE TEST
Biology E/M Sample Test 2
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