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  2. Genetic hitchhiking - Wikipedia

    en.wikipedia.org/wiki/Genetic_hitchhiking

    Both genetic drift and genetic draft are random evolutionary processes, i.e. they act stochastically and in a way that is not correlated with selection at the gene in question. Drift is the change in the frequency of an allele in a population due to random sampling in each generation. [ 9 ]

  3. Genetic drift - Wikipedia

    en.wikipedia.org/wiki/Genetic_drift

    Genetic drift, also known as random genetic drift, allelic drift or the Wright effect, [1] is the change in the frequency of an existing gene variant in a population due to random chance. [ 2 ] Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation . [ 3 ]

  4. Population genetics - Wikipedia

    en.wikipedia.org/wiki/Population_genetics

    Ronald Fisher held the view that genetic drift plays at the most a minor role in evolution, and this remained the dominant view for several decades. No population genetics perspective have ever given genetic drift a central role by itself, but some have made genetic drift important in combination with another non-selective force.

  5. Neutral theory of molecular evolution - Wikipedia

    en.wikipedia.org/wiki/Neutral_theory_of...

    This stochastic process is assumed to obey equations describing random genetic drift by means of accidents of sampling, rather than for example genetic hitchhiking of a neutral allele due to genetic linkage with non-neutral alleles. After appearing by mutation, a neutral allele may become more common within the population via genetic drift.

  6. Antigenic shift - Wikipedia

    en.wikipedia.org/wiki/Antigenic_shift

    Antigenic shift is contrasted with antigenic drift, which is the natural mutation over time of known strains of influenza (or other things, in a more general sense) which may lead to a loss of immunity, or in vaccine mismatch. Antigenic drift occurs in all types of influenza including influenza A, influenza B and influenza C.

  7. Genetic variation - Wikipedia

    en.wikipedia.org/wiki/Genetic_variation

    Genetic variation is the difference in DNA among individuals [1] or the differences between populations among the same species. [2] The multiple sources of genetic variation include mutation and genetic recombination. [3] Mutations are the ultimate sources of genetic variation, but other mechanisms, such as genetic drift, contribute to it, as ...

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  9. Extinction vortex - Wikipedia

    en.wikipedia.org/wiki/Extinction_vortex

    A Vortex: The A vortex is a result of an increase in the impact of genetic drift on the population, due to the population's decreased size. This corresponds with a decrease in genetic variance which leads to a decrease in "population adaptive potential", and eventual extinction.