Question

in a particular mouse species, two extremes of a phenotype are equally selected for over several generations. as a result, the genetic frequency for these two phenotypes begins to increase over the preexisting mean trait. what type of selection has occurred?
a. directional
b. disruptive
c. bottleneck
d. sexual
e. stabilizing

Explanation:

Disruptive selection favors extreme phenotypes over the intermediate ones. In the given scenario, two extremes of a phenotype are selected for, which is characteristic of disruptive selection.

Answer:

B. disruptive