LIFE SCIENCE

Detailed explanation-1: -Answer: natural selection not a requirement for Hardy Weinberg equilibrium.

Detailed explanation-2: -Hardy-Weinberg equilibrium has a set of conditions that must be met in order for the population to have unchanging gene pool frequencies. There must be random mating, no mutation, no migration, no natural selection, and a large sample size. It is not necessary for the population to be at carrying capacity.

Detailed explanation-3: -For those models, the Hardy–Weinberg proportions will normally not be valid. Small population size can cause a random change in allele frequencies. This is due to a sampling effect, and is called genetic drift. Sampling effects are most important when the allele is present in a small number of copies.

Detailed explanation-4: -1) No gene mutations may occur and therefore allele changes do not occur. 2) There must be no migration of individuals either into or out of the population. 3) Random mating must occur, meaning individuals mate by chance. 4) No genetic drift, a chance change in allele frequency, may occur.