Daily Archives: 25 September 2014

September 25, 1866 (a Tuesday)

Thomas Hunt Morgan

On this date, the American embryologist and geneticist Thomas Hunt Morgan was born in Lexington, Kentucky. At Columbia University (1904-28), he began his revolutionary genetic investigations of the fruit fly Drosophila melanogaster (1908). In 1910, he discovered a white-eyed mutant in Drosophila. At that time, it was generally assumed that chromosomes could not be the carriers of the genetic information. Initially skeptical of Gregor Mendel’s research, Morgan performed rigorous experiments eventually demonstrating that genes are linked in a series on chromosomes and are responsible for identifiable, hereditary traits. When he was awarded the Nobel Prize in Physiology or Medicine in 1933, he was the first person awarded the Prize for genetics, for demonstrating hereditary transmission mechanisms in D. melanogaster.