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Wright, Sewall (1889–1988)| US geneticist and statistician. During the 1920s he helped modernize Charles Darwin's theory of evolution, using statistics to model the behaviour of populations of genes. |
| Wright's work on genetic drift centred on a phenomenon occurring in small isolated colonies where the chance disappearance of some types of gene leads to evolution without the influence of natural selection. |
| Wright was born in Melrose, Massachusetts, and educated at the University of Illinois and Harvard. He taught at the University of Chicago for 28 years, before becoming professor of genetics at the University of Wisconsin 1955–60. |
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