Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over
b (brown). D is dominant over d. Homozygous d is epistatic to the black and brown genes. Given this
information, what genotypes give you a white mouse?
a. BBdd
b. Bbdd
c. bbDD
d. bbDd
e. BBdd and Bbdd
E
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