Mouse Pigmentation Is Subject to Epistasis of the B Alleles

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