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Random mating

Biology  Ralstonia solanacearum  RAPD

random mating
selection of a mate without regard to genotype
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...


random mating (also panmixia and panmixis) In a population, mating in which all potential reproductive pairings between individuals occur with equal likelihood. Compare: assortative mating.
rare-cutter enzyme See: restriction site.

Random Mating
In order for all alleles to have an equal chance of being passed down to the next generation, mating within the population must be random.

Nonrandom Mating
One of the cornerstones of the Hardy-Weinberg equilibrium is that mating in the population must be random. If individuals (usually females) are choosy in their selection of mates the gene frequencies may become altered. Darwin called this sexual selection.

Non-Random Mating
Can cause in-breeding depression by continuous inbreeding, non-random mating is also known as selective breeding, where the breakthroughs of Mendelian genetics have allowed us to predetermine what genes are present in offspring.

Non~. A second potential cause of evolution is nonrandom mating. Nonrandom mating usually occurs when individuals choose their mates. Animals often select mates on the basis of fitness, and the results of such sexual selection are indistinguishable from natural selection.

~
See panmixia.
Related Terms:
Panmixia
A mating system in which matings are governed entirely by chance. Also called random mating.

~. The HWP states the population will have the given genotypic frequencies (called Hardy-Weinberg proportions) after a single generation of random mating within the population. When violations of this provision occur, the population will not have Hardy-Weinberg proportions.

~ involves individuals pairing by chance, not according to their genotypes or phenotypes. Nonrandom mating involves individuals inbreeding and assortative mating.

Non-~ results in a deviation from the Hardy-Weinberg distribution. Humans mate assortatively according to race; we are more likely to mate with someone of own race than another. In populations that mate this way, fewer heterozygotes are found than would be predicted under ~.

A type of nonrandom mating in which mating partners resemble each other in certain phenotypic characters.
asymmetric carbon
A carbon atom covalently bonded to four different atoms or groups of atoms.

~. If individuals pick mates with certain genotypes, or if inbreeding is common, the mixing of gametes will not be random.
No natural selection. Differential survival or reproductive success among genotypes will alter their frequencies.

It compares the sum of observed homozygosity for each allele of a given locus (Fo) with the expected Fe value based on the number of alleles in the locus of interest, neutrality expectations and random mating assumption. A test of comparison yields an F value.

Also called random mating.
Related Terms:
Mating system
The pattern of matings between individuals of a population, including such factors as extent of inbreeding, pair-bonding, and number of simultaneous mates.

Recombination can be increased in linkage-mapping designs by random mating of F2 or backcross populations for several generations (so-called advanced intercross lines).

Evolution: analogous structures, competition, convergent , directional selection, divergent, evolution, gene, genetic drift, nonrandom mating, speciation, Charles Darwin, competitive exclusion, convergent evolution, differentiation, divergent evolution, gene flow, natural selection, ...

Hardy-Weinberg law. Law that states that the frequencies of genotypes in a population at a locus are determined by random mating and allele frequency
Herbivore. An organism that consumes plants ...

No mutation,
No natural selection,
The population being large,
No gene flow (due to individuals emigrating or immigrating),
Random mating, ...

Which of the following is not a factor that causes changes in the frequency of homozygous and heterozygous individuals in a population?
a. mutations
b. migration
c. random mating
d. genetic drift ...

However, in organisms with more than one set of chromosomes at the main life cycle stage, sex may also provide an advantage because, under random mating, it produces homozygotes and heterozygotes according to the Hardy-Weinberg ratio.

See also: See also: What is the meaning of Mating, Population, Allele, Organ, Selection?

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