Mouse Pigmentation Is Subject to Epistasis of the B Alleles

question 50

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 will result from a F₁cross between two mice?

• A) 9/16 black, 3/16 brown, 4/16 white
• B) 9/16 white, 3/16 brown, 4/16 black
• C) 9/16 black, 6/16 brown, 1/16 white
• D) 9/16 white, 6/16 brown, 1/16 black
• E) all black mice

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