In rabbits, an allelic series helps to determine coat color: C (full color), c^ch (chinchilla; gray color), c^h (Himalayan; white with black extremities), and c (albino; all white).The C allele is dominant to all others, c^ch is dominant to c^h and c, c^h is dominant to c, and c is recessive to all the other alleles.This dominance hierarchy can be summarized as C c^ch c^h c.Indicate the phenotypic ratios expected in rabbits with the cross c^chc^h × c^hc.

Question

In rabbits, an allelic series helps to determine coat color: C (full color), c^ch (chinchilla; gray color), c^h (Himalayan; white with black extremities), and c (albino; all white).The C allele is dominant to all others, c^ch is dominant to c^h and c, c^h is dominant to c, and c is recessive to all the other alleles.This dominance hierarchy can be summarized as C > c^ch> c^h> c.Indicate the phenotypic ratios expected in rabbits with the cross c^chc^h × c^hc.

Quizplus · Accepted Answer

Given the dominance hierarchy C > c^ch > c^h > c and the cross c^chc^h × c^hc, the offspring can either inherit a chinchilla allele (c^ch) from the first parent and a Himalayan (c^h) or albino (c) allele from the second parent, resulting in a chinchilla phenotype due to the dominance of c^ch over both c^h and c. Alternatively, they can inherit a Himalayan allele from both parents, resulting in a Himalayan phenotype. This leads to a 1:1 phenotypic ratio of chinchilla to Himalayan.

In Rabbits, an Allelic Series Helps to Determine Coat Color