A population of ground squirrels is separated by a glacier. Changes in which of the following would most likely result in reproductive isolation if the two populations came into contact several generations later?
A) A change in the gene encoding of a receptor on the egg- cell surface in one group.
B) A change in the fur colour of one group.
C) A change in the diet of one group.
D) A change in the alarm call of one group to warn of predators.

Question

Quizplus · Accepted Answer

A change in the gene encoding of a receptor on the egg-cell surface in one group would result in gametes that are unable to recognize and fuse with gametes from the other group, which could lead to reproductive isolation. The other options would not necessarily lead to reproductive isolation.

A Population of Ground Squirrels Is Separated by a Glacier