Random changes in allele frequency in a population are called:


gene flow


genetic drift


microevolution


stabilizing selection

Verified Answer :

Neuron

Random changes in allele frequency in a population are usually called genetic drift. The reason why this is the answer is because it is a very specific word which is used to describe exactly that - random changes in allele frequency. 

All the other cases; answers, here aren't correct and don't apply.