quiz3 - Biol241, Quiz 3 1/29/2010 [Questions 1-3] In...

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Biol241, Quiz 3 1/29/2010 [Questions 1-3] In Labrador retriever dogs, the dominant gene B gives black coat color, whereas b gives brown. On another chromosome, the gene e shows recessive epistasis over the B and b genes, resulting in a “golden” coat color, where E allows expression of B and b . A breeder wants to determine the genotypes of his three dogs, so he interbreeds them over several years as follow: Cross Progeny I dog 1 (golden female) 1/2 golden X 3/8 black dog 2 (black male) 1/8 brown II dog 3 (brown female) 1/4 golden X 3/8 black dog 2 (black male) 3/8 brown 1) What is the genotype of dog 1? a) BBee b) Bbee c) bbee d) BbEe 2) What is the genotype of dog 2? a) BBEE b) BbEE c) BBEe d) BbEe 3) What is the genotype of dog 3? a) bbEE b) bbEe c) bbee d) BbEe
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Biol241, Quiz 3 1/29/2010 4) In a regulatory pathway, when the phenotype of mutations in gene A is epistatic to the phenotype of mutations in gene B, you can conclude: a) The mutations in A are null alleles and the mutations in B are hypomorphs
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quiz3 - Biol241, Quiz 3 1/29/2010 [Questions 1-3] In...

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