In Rabbits, an Allelic Series Helps to Determine Coat Color

question 63

Multiple Choice

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 of rabbits with the cross Cc^ch × Cc^h.

• A) 1 full color : 1 chinchilla
• B) 1 full color : 1 Himalayan
• C) 1 chinchilla : 1 Himalayan
• D) 3 full color : 1 chinchilla
• E) 2 full color : 1 Himalayan : 1 albino

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