In population genetics an idealised population, also sometimes called a Fisher-Wright population after R.A. Fisher and Sewall Wright, is a population whose members can mate and reproduce with any other member of the other gender. Population genetics is the study of the Allele frequency distribution and change under the influence of the four evolutionary forces Natural selection, Genetic Sir Ronald Aylmer Fisher, FRS ( 17 February 1890 – 29 July 1962) was an English Statistician, Evolutionary Sewall Green Wright ( December 21, 1889 – March 3, 1988) was an American Geneticist In Biology a population is the collection of inter-breeding organisms of a particular Species; in Sociology Sexual intercourse, in its biological sense is the act in which the male reproductive organ (in humans and other higher animals enters the female reproductive tract Reproduction is the Biological process by which new individual Organisms are produced
Deviation from the idealised population results in the effective population size being smaller than the total population size. In Population genetics, the concept of effective population size N e was introduced by the American Geneticist Sewall