Answer & explanation:
Genetic drift is one of the basic mechanisms of evolution, along with natural selection, migration and mutations.
This mechanism, which is especially important in small populations, can be defined as a change in allelic frequencies that occurs entirely randomly. Although it also affects the genetic makeup of a population, it differs from natural selection by not producing adaptations.
In genetic drift, alleles can be eliminated or fixed in populations.
For example, a population in which there are white fur rodents and black fur rodents.
In the next generation, the proportions will not be identical, and it may happen that one gene is in greater quantity than another. There may still be the complete absence of an allele in one generation, causing its elimination.
