Question

What mechanisem can cause genetic drift in a population?

Answer 1

Geographic isolation leading to reproductive isolation.

Explanation:

Suppose members of a species get geographically isolated that is separeted by natural barriers like mountains,rivers,or sea into 2 groups,hence there would be no exchange of genes among both groups.Now for million years when both groups will produce generation after generation in a totally different environment then there would be a gradual change gene frequency leading to genetic drift.