Contents: Fundamental concepts. -- The nature of inheritance. -- Complications of inheritance. -- Hereditary matter: the chromosome. -- Hereditary matter: inheritance and development - the gene. -- From gene to character: the mode of gene action. -- Reproduction and fitness. -- Asexual reproduction or apomixis. -- Recombination and sexual reproduction. -- Control of recombination and evolution of genetic systems. -- Suggestions for further reading. -- Glossary. -- Index