Suppose That Pigmentation of a Labrador Retriever's Fur Is Subject

question 29

Multiple Choice

Suppose that pigmentation of a Labrador retriever's fur is subject to epistasis of the B alleles by the e alleles. B (black) is dominant over b (chocolate brown) . E is dominant over

• A)9/16 black, 6/16 brown, 1/16 yellow
• B)9/16 yellow, 3/16 brown, 4/16 black
• C)9/16 yellow, 6/16 brown, 1/16 black
• D)9/16 black, 3/16 brown, 4/16 yellow
• E) Homozygous e is epistatic to the black and chocolate-brown genes. Given this information, what will result from a F₁ dihybrid cross between two dogs?

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