NEET BIOLOGY

Detailed explanation-1: -Random changes in allele frequency in a small population are known as genetic drift. Genetic drift can result in the loss of alleles from the population. Ultimately, these alleles will become extinct, or the entire population can become extinct. This can eventually cause rapid evolution.

Detailed explanation-2: -Genetic drift is a random process that can lead to large changes in populations over a short period of time. Random drift is caused by recurring small population sizes, severe reductions in population size called “bottlenecks” and founder events where a new population starts from a small number of individuals.

Detailed explanation-3: -genetic drift, also called genetic sampling error or Sewall Wright effect, a change in the gene pool of a small population that takes place strictly by chance.

Detailed explanation-4: -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.