gene flow vs. genetic drift

gene flow vs. genetic drift: What's the difference?

Gene flow is the movement and exchange of genes between populations of organisms as a result of those organisms interbreeding. Genetic drift is the random fluctuation of the genes in a population’s gene pool (which is the total genetic information of all individuals in that population).

gene flow

noun

Ecology.

the alteration of the frequencies of alleles of particular genes in a population, resulting from interbreeding with organisms from another population having different frequencies.

genetic drift

noun

random changes in the frequency of alleles in a gene pool, usually of small populations.