試題詳解

複選題
17. 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