Main Page | See live article | Alphabetical index 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 Microevolution Molecular evolution Selection Hardy-Weinberg principle Founder's effect Population bottleneck Small population size Genotype-phenotype distinction Fitness landscape Muller's ratchet 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 This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.