Allele frequency is a measure of the relative frequency of an allele on a genetic locus in a population.

Usually it is expressed as a proportion or a percentage.

In population genetics, allele frequencies show the genetic diversity of a species population or equivalently the richness of its gene pool.

The frequencies of all the alleles of a given gene often are graphed together as an allele frequency distribution histogram.

Population genetics studies the different "forces" that might lead to changes in the distribution and frequencies of alleles - in other words, to evolution.

Besides selection, these forces include genetic drift, mutation and migration..

For more information about the topic Allele frequency, read the full article at Wikipedia.org, or see the following related articles:

Allele — An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. Usually alleles are sequences that ...  > read more

Genetic drift — Genetic drift is the term used in population genetics to refer to the statistical drift over time of gene frequencies in a population due to random ...  > read more

Genetic recombination — Genetic recombination is the transmission-genetic process by which the combinations of alleles observed at different loci in two parental individuals ...  > read more

Introduction to genetics — Genetics is the study of how living things receive common traits from previous generations. These traits are described by the genetic information ...  > read more

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