Because of Fluctuations in the Environment, Such as Depletion of Food

Multiple Choice

Because of fluctuations in the environment, such as depletion of food supply or an outbreak of disease, a population may periodically experience a rapid and marked decrease in the number of individuals, leading to a form of genetic drift. What is this form of genetic drift called?

A) a founder effect
B) migration
C) gene flow
D) a genetic bottleneck