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Question 8 (11.111111111 points)

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The dog breeding program encounters epistasis, where one gene affects the expression of another gene. In Labrador retrievers, the E gene determines whether pigment can be deposited, while the B gene determines pigment color. A dog with genotype bbEE would have what phenotype?
Question 8 options:

Yellow coat because the bb genotype prevents all pigment formation

Mixed black and brown coat because both genes are expressed

Black coat because the E gene allows pigment deposition

Brown coat because the B gene determines pigment color when E allows deposition

Answer 1

Brown coat because the B gene determines pigment color when E allows deposition. The bb genotype gives brown (chocolate) and EE allows pigment to be deposited.