Completely updated and revised in a new edition, Principles of Development presents major principles and concepts in the field for an undergraduate audience. Emphasizing gene control as the key to understanding development, the third edition is written in accessible prose, utilizing an impressive art program - 650 full color figures - as well as summaries and diagrams throughout the text to illuminate conceptually challenging material. In addition, the third edition presents carefully selected articles for further reading that expound on principles covered in the text.