NEET BIOLOGY

Detailed explanation-1: -Genetic drift can result in the loss of rare alleles, and can decrease the size of the gene pool. Genetic drift can also cause a new population to be genetically distinct from its original population, which has led to the hypothesis that genetic drift plays a role in the evolution of new species.

Detailed explanation-2: -Small populations tend to lose genetic diversity more quickly than large populations due to stochastic sampling error (i.e., genetic drift). This is because some versions of a gene can be lost due to random chance, and this is more likely to occur when populations are small.

Detailed explanation-3: -In populations in which an allele has become either fixed or lost, the process of random genetic drift stops at that locus. Without further input (mutation), the populations that have allelic frequencies of 1.0 or 0 for either allele will maintain those allelic frequencies forever.