Mouse Pigmentation Is Subject to Epistasis of the B Alleles

question 27

Multiple Choice

Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown) , and D is dominant over d . Homozygous d is epistatic to the black and brown genes. Given this information, what genotype(s) result in a white mouse (no pigment) ?

• A) BBdd only
• B) Bbdd only
• C) bbDD only
• D) bbDd only
• E) BBdd and Bbdd

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