In Siamese Cats, Enzymes That Code for Dark Fur Color

Multiple Choice

In Siamese cats, enzymes that code for dark fur color are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of ____.

A) pleiotropy
B) environmental effects
C) epistasis
D) incomplete dominance
E) codominance