NEET BIOLOGY

Detailed explanation-1: -Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error). Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations.

Detailed explanation-2: -Random forces lead to genetic drift These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. Typically, genetic drift occurs in small populations, where infrequently-occurring alleles face a greater chance of being lost.

Detailed explanation-3: -Random changes in allele frequency of a small population just by chance is called genetic drift. Changes in the allele frequency of a population’s gene pool due to random chance is known as genetic drift. It is one of the forces that can drive the process of evolution in a population.

Detailed explanation-4: -In a population, allele frequencies are a reflection of genetic diversity. Changes in allele frequencies over time can indicate that genetic drift is occurring or that new mutations have been introduced into the population.

Detailed explanation-5: -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.