Siamese cats have enzymes that code for dark fur color but 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) co-dominance.

Question

Quizplus · Accepted Answer

The different fur color in different regions of the Siamese cat's body is due to the effect of temperature on enzyme activity. This is an example of an environmental effect, where the phenotype is affected by external factors such as temperature, rather than being solely determined by genetics. The other options, pleiotropy, epistasis, incomplete dominance, and co-dominance, refer to genetic mechanisms of inheritance and do not apply to this example.

Siamese Cats Have Enzymes That Code for Dark Fur Color