Alfred Sturtevant

Alfred Henry Sturtevant was an American geneticist. 

Sturtevant constructed the first genetic map of a chromosome in 1911. Throughout his career he worked on the organism Drosophila melanogaster with Thomas Hunt Morgan. By watching the development of flies in which the earliest cell division produced two different genomes, he measured the embryonic distance between organs in a unit which is called the sturt in his honor. In 1967, Sturtevant received the National Medal of Science.

Alfred Henry Sturtevant was born in Jacksonville, Illinois, United States on November 21, 1891, the youngest of Alfred Henry and Harriet Sturtevant's six children. His grandfather Julian Monson Sturtevant, a Yale University graduate, was a founding professor and second president of Illinois College, where his father taught mathematics.

When Sturtevant was seven years old, his father quit his teaching job and moved the family to Alabama to pursue farming. Sturtevant attended a one-room schoolhouse until entering high school in Mobile. In 1908, he enrolled at Columbia University. During this time, he lived with his older brother Edgar, a linguist, who taught nearby. Edgar taught Alfred about scholarship and research.

As a child, Sturtevant had created pedigrees of his father's horses. While in college, he read about Mendelism, which piqued Sturtevant's interest because it could explain the traits expressed in the horse pedigrees. He further pursued his interest in genetics under Thomas Hunt Morgan, who encouraged him to publish a paper of his pedigrees shown through Mendelian genetics. In 1914, Sturtevant completed his doctoral work under Morgan as well.

After earning his doctorate, Sturtevant stayed at Columbia as a research investigator for the Carnegie Institution of Washington. He joined Morgan's research team in the "fly room", in which huge advances were being made in the study of genetics through studies of the fruit fly Drosophila. In 1922, he married Phoebe Curtis Reed, and the couple subsequently had three children, the eldest of whom was William C. Sturtevant.

In 1928, Sturtevant moved to Pasadena to work at the California Institute of Technology, where he became a Professor of Genetics and remained for the rest of his career, except for one year when he was invited to teach in Europe. He taught an undergraduate course in genetics at Caltech and wrote a textbook with George Beadle. He became the leader of a new genetics research group at Caltech, whose members included George W. Beadle, Theodosius Dobzhansky, Sterling Emerson, and Jack Schultz. He was elected a Fellow of the American Academy of Arts and Sciences in 1949.[1] Sturtevant was awarded the John J. Carty Award from the National Academy of Sciences in 1965 .[2] In 1967, he received the National Medal of Science for his longtime work on the genetics of Drosophila and other organisms.

Sturtevant was interested in taxonomy as well as genetics. He loved solving all kinds of puzzles and saw genetics as a puzzle for him to decipher. He was widely read, interested in politics, newspapers, scientific journals across many subjects and crossword puzzles. He had an impressive memory and composed and edited papers in his head before writing them down from memory. He enjoyed a long and prosperous career in genetics until his death on April 5, 1970. He died in Pasadena, California at the age of 78.