The Pleiotropy That Occurs When a Single Gene Controls Multiple

Multiple Choice

The pleiotropy that occurs when a single gene controls multiple skeletal traits in dogs,such as leg bone length and skull size,may be explained because

A) dogs share a common ancestor.
B) the skeletal traits are related in the overall function of the dog.
C) dogs have lived with humans for thousands of years.
D) the effect of this gene depends on the environment.