had 48 chromosomes Martin Evans (born 1941), British scientist, discovered embryonic stem cells and developed knockout mouse Cassandra Extavour, Canadian American geneticist and Professor of Organismic and Evolutionary Biology at Harvard University Warren Ewens (born 1937), Australian-US mathematical population geneticist, Ewens's sampling formula F Alexander Cyril Fabergé (1912–1988), Russian-born Anglo-American geneticist, grandson of Carl Fabergé Arturo Falaschi (1933–2010), Italian geneticist, researched the origin of DNA replication D. S. Falconer (1913–2004), Scottish quantitative geneticist, wrote textbook to the subject Darrel R. Falk (born 1946), US biologist Stanley Falkow (1934–2018), US microbial geneticist, molecular mechanisms of bacterial pathogenesis Harold Falls (1909–2006), US ophthalmologic geneticist, helped found first genetics clinic in US William C. Farabee (1865–1925), US anthropologist, brachydactyly is evidence of Mendelism in humans Nina Fedoroff (born c. 1945), US plant geneticist, cloning of transposable elements, plant stress response Malcolm Ferguson-Smith (born 1931) UK cytogeneticist, Klinefelter syndrome, chromosome flow cytometry Philip J. Fialkow (1934–1996), US internist, educator, research in medical genetics and cancer genetics Giorgio Filippi (1935–1996), Italian medical geneticist, researched diseases linked to X chromosome J. R. S. Fincham (1926–2005), UK microbial (Neurospora) and biochemical geneticist Gerald Fink (born 1941), US molecular geneticist, preeminent figure in the field of yeast genetics Hilary Finucane, computational biologist with research focus on combining genetic data and molecular data to characterize mechanisms of disease Andrew Fire (born 1959), US geneticist, Nobel Prize with Mello for discovery of RNA interference Robert L. Fischer (born 1950), US geneticist, contributed to the understanding of genomic imprinting and epigenetics R. A. Fisher (1890–1962), British stellar statistician, evolutionary biologist, and geneticist Ed Fischer (1920–2021), Swiss-US biochemist, Nobel Prize for phosphorylation as switch activating proteins Eugen Fischer (1874–1967), German physician, anthropologist, eugenicist, influenced Nazi racial hygiene Ivar Asbjørn Følling (1888–1973), Norwegian biochemist and physician who discovered phenylketonuria (PKU) E. B. Ford (1901–1988), British ecological geneticist, specializing in butterflies and moths Charles Ford (1912–1999), British pioneer in the golden age of mammalian cytogenetics Ruth Fowler Edwards (1930–2013), British geneticist who helped develop controlled ovulation induction in the mouse Heinz Fraenkel-Conrat (1910–1999), German-born US biochemist who studied tobacco mosaic virus Rosalind Franklin (1920–1958), British crystallographer whose data led to discovery of double helix Clarke Fraser (1920–2014), Canada's first medical geneticist, student of congenital malformations Elaine Fuchs (born c. 1951), US cell biologist, molecular mechanisms of skin diseases, reverse genetics Walter Fuhrmann (1924–1995), German medical geneticist, at Giessen University Douglas J. Futuyma (born 1942),