Population genetics Population genetics is the study of the distribution of and change in allele frequencies under the influence of the four evolutionary forces: natural selection genetic drift mutation and migration . It also takes account of population subdivision and population structure in space. As such, it is the theory that attempts to explain such phenomena as adaptation and speciation . Population genetics was a vital ingredient in the modern evolutionary synthesis , its primary founders were Sewall Wright J. B. S. Haldane and Ronald Fisher , who also laid the foundations for the related discipline of quantitative genetics . Notable population geneticists of the mid-to-late 20th century include Japanese Mooto Kimura, American Richard Lewontin and Italian Luigi Luca Cavalli-Sforza See also Molecular evolution Selection Hardy-Weinberg principle ... Mutational meltdown External references - John Gillespie Population Genetics: A Concise Guide , Johns Hopkins Press, 1998 ISBN 0-8018-5755-4 Daniel Hartl Primer of Population Genetics , 3rd edition, Sinauer, 2000 ISBN 0878933042 Daniel Hartl and Andrew Clark Principles of Population Genetics , 3rd edition, Sinauer 1997 ISBN 0-87893-306-9
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