Famous for its clear, comprehensive presentation, this popular introductory textbook is now available in a newly revised edition, one that has been thoroughly updated to reflect the significant advances since the previous edition appeared in 1983. The new text gives full attention to every topic covered in undergraduate genetics courses, from the principles of Mendelian inheritance to the mechanisms of molecular biology. The discussions are succinct and easy to understand. In addition to basic concepts, Rothwell explains new research and sophisticated experiments in straightforward language that is accessible to students coming to the field for the first time. The text has been specifically designed for students with no previous background in the subject, and the author has increased the number of study questions and problems to facilitate monitoring progress. Many new illustrations have also been added.