Traits may be correlated with one another rather than evolving completely independently. This may happen because
A) a single gene, such as a regulatory gene, may affect several traits.
B) genes for two traits may be located at analogous sites on different chromosomes.
C) the effect of such trait combinations is consistently positive.
D) all of the above.

Question

Quizplus · Accepted Answer

A single gene, especially a regulatory gene, can influence multiple traits, leading to correlations among traits. This is known as pleiotropy.

Traits May Be Correlated with One Another Rather Than Evolving