Figure $19.4$Do you think genetic drift would happen more quickly on an island or on the mainland?

Genetic drift explains how all forms of gene variations in a population fluctuate at random. When alleles, or variants in a gene, arise, genetic drift occurs. Changes in allele frequencies are used to quantify these allele variants.

An island's geographical area is substantially less than that of the main landmass. As a result, genetic drift occurs most swiftly on an island. Other variables also have an impact on the mainland's gene frequency variation. Natural selection played a role in this. Genetic drift causes mutations, migration, and alterations.

As a result, the population size of species on the mainland is substantially larger than on an island. As a result, gene frequency is extremely low and difficult to track. The island species, on the other hand, interbreeds among itself and does not require the introduction of new genes. As a result, genetic drift can be easily tracked.