E. In rabbits, an allelic series helps to determine coat color:
E. In rabbits, an allelic series helps to determine coat color:
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No. 27 In rabbits, a series of multiple alleles controls coat color in the following way: C is dominant to all other alleles and causes full color (F). The chinchilla (CH) phenotype is due to the cch allele, which dominant to all alleles other than C. The ch allele, dominant only to ca (albino, A), results in the Himalayan (H) coat color. Thus, the order of dominance is C>cch>ch>ca for each of the following three cases, the phenotypes of the P1 generation of two crosses are shown, as well as the phenotype of one member of the F1 generation. Determine the genotypes of the P1 generation and the F1 offspring for each case, and predict the results of making each cross between F1 individuals as shown
P1 pheno. | P1 genotypes | F1 pheno. | F1 genotypes | F2 genotypes & phenotypes | |
(a) | H Ã H | â | A | ||
à | â | ||||
F Ã A | â | CH | |||
(b) | A Ã CH | â | A | ||
à | â | ||||
F Ã A | â | F | |||
(c) | CH Ã A | â | H | ||
à | â | ||||
F Ã A | â | H |