When gene flow occurs, it's effect is the opposite of genetic drift, because
A) it requires smaller populations to work.
B) it is very difficult to measure.
C) it decreases the genetic differences between populations.
D) it rarely happens in 21st Century cultures.

Question

Quizplus · Accepted Answer

Gene flow involves the transfer of genetic material between populations, which tends to decrease genetic differences between them, whereas genetic drift increases genetic differences by random changes in allele frequencies, especially in small populations.

When Gene Flow Occurs, It's Effect Is the Opposite of Genetic