LIFE SCIENCE

Detailed explanation-1: -The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most individuals and leaving behind a small, random assortment of survivors.

Detailed explanation-2: -Genetic drift is common after a population experiences a population bottleneck. A population bottleneck arises when a significant number of individuals in a population die or are otherwise prevented from breeding, resulting in a drastic decrease in the size of the population.

Detailed explanation-3: -Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a population’s size is reduced for at least one generation.

Detailed explanation-4: -Genetic drift is also known as bottleneck phenomenon or Sewall Wright effect. Genetic drift causes a sudden change/loss of gene pool of a species. Due to this the variation of that species reduces which in turn causes reduced genetic diversity in resulting offspring.