genetic equilibrium


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ge·net·ic e·qui·lib·ri·um

the condition of a dynamic genetic system in which the several rates of change between all possible pairs of parts are such that the composition is invariant.

genetic equilibrium

the state within a population at which the frequency of alleles and genotypes does not change from generation to generation. It routinely occurs in large, interbreeding populations in which mating is random and there are no or relatively few mutations. See also Hardy-Weinberg equilibrium principle.

genetic equilibrium

or

equilibrium of population

a state that occurs when GENE FREQUENCIES are constant in a population for several generations. Such equilibrium may also be found where SELECTION is operating to produce a stable GENETIC POLYMORPHISM. See also HARDY-WEINBERG LAW.
References in periodicals archive ?
This is evidence of disturbed genetic equilibrium in relation to MC4R/Ncol genotypes within the study population.
In this case, sex chromosomes and autosomal polymorphisms should not be in genetic equilibrium and there should be differences in the extent of chromosome pairing and morphologies of chromocenters when putative parental and combinational types are compared.
f] depend on r, which is not known for control regions for guillemots; however, r cancels from equation (3), so that populations may be considered to be in genetic equilibrium (and to have undergone complete lineage sorting) if [Delta] [greater than] 4 [Pi] / g.
He also describes how these techniques can be used to test hypotheses about population structure and genetic equilibrium.
Large population sizes (as occur in many marine species) slow both genetic drift and any approach to genetic equilibrium (Birky et al.
Genetic equilibrium when more than one ecological niche is available.
that F, [Theta], and [Alpha] were zero), and expected gene correlations were obtained for generations subsequent to the initial generation until genetic equilibrium was reached.
Genetic equilibrium and population growth under density-regulated selection.
The above calculations involve several assumptions, the most important of which are (1) an island model of dispersal, and (2) genetic equilibrium both among and within subpopulations.
A continuing flux of gene flow and expansion will keep populations out of genetic equilibrium (Slatkin 1993), and the repeated founding of new populations during expansion will tend to reduce heterozygosity (Nagylaki 1976).
Slatkin has shown that for allele frequency data, the statistic [Mathematical Expression Omitted] can be computed, and in populations with restricted dispersal and at a genetic equilibrium, there is a simple decreasing relationship between [Mathematical Expression Omitted] computed for pairs of populations and geographic distance separating populations in each pair.