Caption

Caricature of the US geneticist and Nobel Laureate Thomas Hunt Morgan (1866-1945). Morgan is best known for proving that the chromosome is the carrier of heredity, and that chromosomes consists of genes. His work in genetics is largely remembered for the use of the fruit fly Drosophila melanogaster, and for establishing many ideas in chromosome theory. He also discovered crossover (the exchange of genes between chromosomes), and helped produce the first chromosome map. In 1933 he was awarded the Nobel Prize for Physiology or Medicine.