Speciation Can Reveal Traits That Cause Reproductive Isolation.These Traits

Question

Speciation can reveal traits that cause reproductive isolation.These traits
A)can include a change in one gene or in a small number of genes.
B)can include a change in a large number of genes and gene interactions.
C)don't depend on genetic variation as long as geographic variation is maintained.
D)depend on sexual selection.
E)A and B

Accepted Answer

Traits that cause reproductive isolation can be due to either a change in a small number of genes or a change in a large number of genes and gene interactions. Therefore, both choices A and B are correct. Choices C and D are incorrect because reproductive isolation does depend on genetic variation and can occur without sexual selection playing a role.