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  2. Neutral theory of molecular evolution - Wikipedia

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

    The neutral theory of molecular evolution holds that most evolutionary changes occur at the molecular level, and most of the variation within and between species are due to random genetic drift of mutant alleles that are selectively neutral.

  3. Neutral mutation - Wikipedia

    en.wikipedia.org/wiki/Neutral_mutation

    Neutral mutation has become a part of the neutral theory of molecular evolution, proposed in the 1960s. This theory suggests that neutral mutations are responsible for a large portion of DNA sequence changes in a species.

  4. The Neutral Theory of Molecular Evolution - Wikipedia

    en.wikipedia.org/wiki/The_Neutral_Theory_of...

    Evolution is a change in the frequency of alleles in a population over time. Mutations occur at random and in the Darwinian evolution model natural selection acts on the genetic variation in a population that has arisen through this mutation. [2] These mutations can be beneficial or deleterious and are selected for or against based on that factor.

  5. Evolution - Wikipedia

    en.wikipedia.org/wiki/Evolution

    According to the neutral theory of molecular evolution most evolutionary changes are the result of the fixation of neutral mutations by genetic drift. [92] In this model, most genetic changes in a population are thus the result of constant mutation pressure and genetic drift. [93]

  6. Evolutionary biology - Wikipedia

    en.wikipedia.org/wiki/Evolutionary_biology

    The mechanisms of evolution focus mainly on mutation, genetic drift, gene flow, non-random mating, and natural selection. Mutation: Mutation [12] is a change in the DNA sequence inside a gene or a chromosome of an organism. Most mutations are deleterious, or neutral; i.e. they can neither harm nor benefit, but can also be beneficial sometimes.

  7. Alternatives to Darwinian evolution - Wikipedia

    en.wikipedia.org/wiki/Alternatives_to_Darwinian...

    The neutral theory of molecular evolution, proposed by Motoo Kimura in 1968, holds that at the molecular level most evolutionary changes and most of the variation within and between species is not caused by natural selection but by genetic drift of mutant alleles that are neutral.

  8. Mutation - Wikipedia

    en.wikipedia.org/wiki/Mutation

    In the neutral theory of molecular evolution, neutral mutations provide genetic drift as the basis for most variation at the molecular level. In animals or plants, most mutations are neutral, given that the vast majority of their genomes is either non-coding or consists of repetitive sequences that have no obvious function (" junk DNA ").

  9. Molecular evolution - Wikipedia

    en.wikipedia.org/wiki/Molecular_evolution

    Molecular evolution describes how inherited DNA and/or RNA change over evolutionary time, and the consequences of this for proteins and other components of cells and organisms. Molecular evolution is the basis of phylogenetic approaches to describing the tree of life .