試題詳解

49. The elytron colors of ground beetles are polygenically inherited. If one male ground beetle was genotyped as AaBbCc and a female was genotyped as AaBbCc. The uppercase letters in the genotype are the dark-color alleles, and the lowercase letters are the light-color alleles. What is the probability of second darkest colored elytra in their immediate offspring?
(A) 6/64
(B) 15/64
(C) 20/64
(D) 12/64
(E) 1/64