Through experiments with garden peas, Moravian botanist Gregor Johann Mendel determined the laws of heredity, the later foundation for the science of genetics.
William Bateson published the first English translation of his work in 1900.
This ethnic German joined the friars of the Order of Saint Augustine, who then gave his first name.
Photo credit: Wellcome Library, London., Portrait of Mendel in oval., Life of Mendel, Iltis, Hugo. Published: Allen and Unwin 1932. Facing page 264, plate X.