in developmental genetics, mentor of Walter Gehring JBS Haldane (1892–1964), brilliant British human geneticist and co-founder of population genetics Ben Hall, US geneticist, DNA:RNA hybridization, yeast production of genetically engineered proteins Judy Hall (born 1939), dual American and Canadian charismatic clinical geneticist and dysmorphologist Dean Hamer (born 1951) US geneticist, postulated gay gene and God gene for religious experience John Hamerton (1929–2006), UK-Canadian cytogeneticist, prenatal diagnostician, bioethicist W. D. Hamilton (1936–2000), British evolutionary biologist and eminent evolutionary theorist Phil Hanawalt (born 1931), US geneticist, discovered DNA repair replication Anita Harding (1952–1995), UK neurologist, first mitochondrial DNA mutation in disease G. H. Hardy (1877–1947), British mathematician, formulated basic law of population genetics Henry Harpending (1944–2016), US anthropologist and human population geneticist Harry Harris (1919–1994), British biochemical geneticist par excellence Henry Harris (1925–2014), Australian-born cell biologist, work on cancer and human genetics Lee Hartwell (born 1939), US yeast geneticist, Nobel Prize, "start" gene and checkpoints in the cell cycle Mogens Hauge (1922–1988), Danish medical geneticist and twin researcher Donald Hawthorne (1926–2003), US, major contributor to yeast genetics, centromere-linked gene maps William Hayes (1918–1994), Australian physician, microbiologist and geneticist, bacterial conjugation Robert Haynes (1931–1998), Canadian geneticist and biophysicist, work on DNA repair and mutagenesis Frederick Hecht (born 1930), US clinical geneticist, cytogeneticist, coined term fragile site Michael Heidelberger (1888–1991) US pioneer of modern immunology, won two Lasker Awards Martin Heisenberg (born 1940), German geneticist, neurobiologist, genetic study of brain of Drosophila Charles Roy Henderson, (1911–1989), US animal geneticist, basis for genetic evaluation of livestock, developed statistical methods used in animal breeding Al Hershey (1908–1997), US bacterial geneticist, Nobel Prize largely for Hershey–Chase experiment Ira Herskowitz (1946–2003), US phage and yeast geneticist, genetic regulatory circuits and mechanisms Len Herzenberg (1931–2013), US human geneticist, immunologist, cell biologist and cell sorter Avram Hershko (born 1937), Israeli biologist, Nobel Prize for ubiquitin-mediated protein degradation Kurt Hirschhorn (born 1926), Viennese-born American pediatrician, medical geneticist, cytogeneticist; described Wolf–Hirschhorn syndrome Mahlon Hoagland (1921–2009), US physician and biochemist, co-discovered tRNA with Paul Zamecnik Dorothy Hodgkin (1910–1994), British founder of protein crystallography and Nobel Prize winner Robert W. Holley (1922–1993), US biochemist, structure of transfer RNA, Nobel Prize Leroy Hood (born 1938), US molecular biotechnologist, created DNA and protein sequencers and synthesizers Norman Horowitz (1915–2005), US geneticist, one gene-one enzyme, chemical evolution, space biology H. Robert Horvitz (born 1947), US cell biologist, Nobel Prize for programmed cell death David E. Housman, US