1996 Death Julius Marmur, biochemist/geneticist, dies at 70 1994 Death Jerome Lejeune, French geneticist (Syndrome of Down), dies at 67 1992 Death Barbara McClintock, U.S., geneticist (Nobel 1983), dies at 90 1988 Death Sewall Wright, U.S. geneticist (evolution model), dies at 98 1943 Death Nikolai Vavilov, geneticist, Saratovv labour camp, dies 1931 Death John P Lotsy, botanist/geneticist (Resumptio Genetics), dies at 64 1926 Birthday J R S Fincham, geneticist 1926 Birthday Julius Marmur, biochemist/geneticist 1922 Birthday Naomi Datta, geneticist 1916 Birthday John Thoday, geneticist 1909 Birthday Edward L Tatum, U.S., molecular geneticist, Nobel 1958 1907 Event Cyril Astley Clarke, British geneticist 1903 Birthday George Davis Snell, Bradford Massachusetts, geneticist, H-2 gene 1867 Birthday John P Lotsy, Dutch botanist/geneticist, Genetics 1822 Birthday Gregor Mendel, monk/geneticist, discoverer of laws of heredity 1822 Birthday Francis Galton, Birmingham England, anthropologist and geneticist