# [Answer] What genotype frequencies are expected under Hardy-Weinberg equilibrium for a population with allele frequencies of p = 0.8 and q = 0.2 for a particular gene?

###### Answer: The expected genotype frequencies are 0.64 0.32 and 0.04 for A1A1 A1A2 and A2A2 respectively.
What genotype frequencies are expected under Hardy-Weinberg equilibrium for a population with allele frequencies of p = 0.8 and q = 0.2 for a particular gene?

In population genetics the Hardy–Weinberg principle also known as the Hardy–Weinberg equilibrium model theorem or law states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. These influences include genetic drift mate choice assortative mating natural selection sexual selection mutation gene flow meiotic drive genetic hitchhiking population bottleneck founder effect and inbreeding.

Allele frequency – Wikipedia

Allele frequency – Wikipedia

Allele frequency – Wikipedia

Hardy–Weinberg principle – Wikipedia

Thu May 27 2004 14:30:00 GMT-0400 (Eastern Daylight Time) · where the expected frequency at Hardy–Weinberg equilibrium is given by ⁡ (()) = where p and q are the allele frequencies of A and a respectively. It is also the probability that at any locus two alleles from a random individual of the population are identical by descent.

Allele frequency or gene frequency is the relative frequency of an allele (variant of a gene ) at a particular locus in a population expressed as a fraction or percentage. Specifically it is the fraction of all chromosomes in the population that carry that allele . Microevolution is the change in allele frequencies that occurs over time within a population .

Wed Aug 14 2002 14:30:00 GMT-0400 (Eastern Daylight Time) · Genetic drift (also known as allelic drift or the Sewall Wright effect) is the change in the frequency of an existing gene variant in a population due to random sampling of organisms. The alleles in the offspring are a sample of those in the parents and chance has a role in determining whether a given individual survives and reproduces. A population s allele frequency is the fra…