Originally published during the early part of the twentieth century, the Cambridge Manuals of Science and Literature were designed to provide concise introductions to a broad range of topics. They were written by experts for the general reader and combined a comprehensive approach to knowledge with an emphasis on accessibility. This volume contains the 1921 third edition of L. Doncaster's Heredity in the Light of Recent Research. It offers a contemporaneous account of the most important advances in the study of heredity during the beginning of the twentieth century.