• Heredity is to-day the central problem of biology. This problem may be approached from many sides - that of the breeder, the experimenter, the statistician, the physiologist, the embryologist, the cytologist - but the mechanism of heredity can be studied best by the investigation of the germ cells and their development.

    "The Mechanism of Heredity". "Science", Vol. 27, No. 691, January 17, 1908.