A group is experimenting with selection in a mouse model for a disease that is lethal in mid- life. After 30 generations of exposure, the population's average life span is near that of a wild- type mouse population. What type of selection did the model mouse population undergo?
A) disruptive selection
B) directional selection
C) threshold effect
D) additive genes
E) stabilizing selection

Question

Quizplus · Accepted Answer

The population underwent directional selection, as the selection pressure favored individuals with traits that allowed them to survive longer, shifting the average lifespan towards that of the wild-type population.

A Group Is Experimenting with Selection in a Mouse Model