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 F1 cross 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


ANSWER: a

Biology & Microbiology

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