Teachers and research workers sometimes find it very difficult to know the precise meaning of many terms, concepts, phenomenon and principles in genetics, which form foundation of the subject matter. This book deals with topics in areas like classical genetics, biochemical genetics, molecular genetics, mutagenesis, evolutionary genetics, cytogenetics and population genetics. The concepts and principles are illustrated with the help of information in the tables and figures. The subject matter in each chapter is followed by brief information on useful reading materials, a set of review questions and numerical problems (wherever desired). Glossary provided at the end includes definitions and descriptions of more than 1,000 important terms. A section on bibliography will help the readers in selecting references for further reading. Comprehensive subject and author indexes are available at the end of the book. This book will serve as a text/reference book for teachers, students, research workers in conventional and agricultural universities.