Description: (American Geneticist Who Constructed the First Genetic Map of a Chromosome)
Alfred Henry Sturtevant, an American geneticist, is known for creating the first genetic map of a chromosome in 1911. He collaborated with Thomas Hunt Morgan on Drosophila melanogaster research. Sturtevant's research involved observing cell division in flies to measure embryonic distances between organs, which led to the establishment of the "sturt" unit named in his honor. In 1967, he was awarded the National Medal of Science by President Lyndon B. Johnson for his significant contributions to science.