genetics: Evolutionary Mechanisms
The study of mutations, together with the analyses of population genetics, has been used to explain the mechanism of evolution. The elementary process of evolution is considered to be the changes in the frequency of occurrence of alleles in a population. Mutation, which causes the appearance of new alleles or changes the relative frequency of already existing alleles, is one important mechanism by which evolution occurs. Natural selection (see selection), by affecting reproductive success, influences the frequencies of alleles and other genetic variants in successive generations. For example, if the presence of a particular allele makes a homozygous individual unable to mate, the allele may be eliminated from the population.
- Basic Laws and Terminology
- Modifications of Mendel's Principles
- Evolutionary Mechanisms
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