Geneticist who won the Nobel Prize in Medicine for demonstrating that X-Rays can cause mutations by striking genes.
He studied at Columbia University, where his interest in genetics was first sparked by E.B. Wilson, who introduced the theory of heredity via genes.
Establishing, in his early research, that genes can pass down traits to subsequent generations, he started experiments inducing mutations through the use of X-Rays.
He was born in New York, and his grandparents were immigrants from the Rhineland.
Edward Tatum, another American Nobel Prize wiiner, also experimented with the genes of Drosophila flies.