This is a list of people who have made notable contributions to genetics. The growth and development of genetics represents the work of many people. This list of geneticists is therefore by no means complete. Contributors of great distinction to genetics are not yet on the list. A Dagfinn Aarskog (1928–2014), Norwegian pediatrician and geneticist, described Aarskog–Scott syndrome Jon Aase (born 1936), US dysmorphologist, described Aase syndrome, expert on fetal alcohol syndrome John Abelson (born c. 1939), US biochemist, studies of machinery and mechanism of RNA splicing Susan L. Ackerman, US neurogeneticist, genes controlling brain development and neuron survival Jerry Adams (born 1940), US molecular biologist in Australia, hematopoietic genetics and cancer Bruce Alberts (born 1938), US biochemist, phage worker, studied DNA replication and cell division William Allan (1881–1943), US country doctor, pioneered human genetics C. David Allis (born 1951), US biologist with a fascination for chromatin Robin Allshire (born 1960), UK-based Irish molecular biologist/geneticist and expert in formation of heterochromatin and centromeres Carl-Henry Alström (1907–1993), Swedish psychiatrist, described genetic disease: Alström syndrome Frederick Alt, American geneticist known for research on maintenance of genome stability in the cells of the mammalian immunological system Russ Altman, US geneticist and bioengineer known for his work in pharmacogenomics Sidney Altman (1939–2022), Canadian-US biophysicist who won Nobel Prize for catalytic functions of RNA Cecil A. Alport (1880–1959), UK internist, identified Alport syndrome (hereditary nephritis and deafness) David Altshuler (born c. 1965), US endocrinologist and geneticist, the genetics of type 2 diabetes Bruce Ames (born 1928), US molecular geneticist, created Ames test to screen chemicals for mutagenicity D. Bernard Amos (1923–2003), UK-US immunologist who studied the genetics of individuality Edgar Anderson (1897–1969), eminent US botanical geneticist E. G. ("Andy") Anderson (1924–1993), US Drosophila and maize geneticist William French Anderson (born 1936), US worker in gene therapy Corino Andrade (1906–2005), Portuguese neurologist and clinical geneticist Tim Anson (1901–1968), US molecular biologist, proposed protein folding a reversible two-state reaction Stylianos E. Antonarakis (born 1951), US-Greek medical geneticist, genotypic and phenotypic variation Werner Arber (born 1929), Swiss microbiologist, Nobel Prize for discovery of restriction endonucleases Enrico Arpaia (born 1949), Canadian molecular geneticist, Tay–Sachs disease, Zap70, Purine Nucleoside Phosphorylase Michael Ashburner (born 1942), British Drosophila geneticist and polymath William Astbury (1898–1961), UK molecular biologist, X-ray crystallography of proteins and DNA Giuseppe Attardi (1923–2008), Italian-US molecular biologist, genetics of human mitochondrial function Charlotte Auerbach (1899–1994), German-born British pioneer in mutagenesis