Genetic drift is hints genetic drift is adaptive more likely to have an impact on small populations an important microevolutionary mechanism in large populations the mechanism by which new alleles originate

"Genetic drift is more likely to have an impact on small populations."

Genetic drift is changing the frequency in the allelic pool of a population. This phenomenon impacts mainly smaller populations because these populations have only a few copies of the alleles present. If a change in the frequency of the alleles happens then it may cause the disappearance of certain alleles because there are only so many copies.