When populations are small, gene frequencies can change from generation to generation and some alleles may become fixed in a population. This is called __________ .
A. assortative mating
B. inbreeding
C. heterosis
D. genetic drift
Answer:D
When populations are small, gene frequencies can change from generation to generation and some alleles may become fixed in a population. This is called __________ .
A. assortative mating B. inbreeding C. heterosis D. genetic drift