In Rabbits, an Allelic Series Helps to Determine Coat Color

question 130

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 in rabbits with the cross Cc^h × cc.

• 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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Definitions:

Cell body

The part of a neuron that contains the nucleus and most of the cytoplasm and organelles.

Axons

Long, thin fibers that are part of nerve cells (neurons), responsible for transmitting electrical impulses away from the neuron's cell body.

Myelin

A fatty substance that insulates the axon and allows it to send nerve impulses quickly.

Schwann cells

Specialized cells located in the peripheral nervous system, responsible for the formation of myelin sheaths around neurons, facilitating rapid signal transmission.