Natural selection

Natural selection is the process of uneven transfer of alleles derived from particular individuals to the gene pool of the following generations through their progeny.This process is fully responsible for the origin of evolutionary adaptations and partly responsible for increase of disparity during evolution. It can occur in a number of quite different ways, and thus it is possible to differentiate several basic types of natural selection and also their combinations.The individual types of selection can be studied from the standpoint of their impact on the course of evolution, i.e. on the speed and direction of changes that they cause in the gene pool of the population, and from the standpoint of the level at which the selection acts (alleles, individuals, populations, etc.). We can recognize for example environmental selection, sexual selection, parental selection, hard selection, soft selection, r-selection, K-selection, random selection, turbidostatic selection, chemostatic selection, frequency-dependent selection, apostatic selection, stabilizing selection, disruptive selection, directional selection, individual selection, group selection, kin selection, interspecies selection, intercommunity selection, interallele selection.

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The classical Darwinian theory of evolution can explain the evolution of adaptive traits only in asexual organisms. The frozen plasticity theory is much more general: It can also explain the origin and evolution of adaptive traits in both asexual and sexual organisms Read more