This updated text explains how advances in mammalian and plant genetics contribute to better therapeutics agents and more wholesome foods. It addresses such topics as new pharmaceutical agents, agribiotechnology, safety evaluation of biotechnology-derived drugs, food safety, nutritional science, and regulatory and environmental aspects of genetically-modified organisms. New to this edition are chapters on biotherapeutics and herbicide-resistant crops. It should be of interest to biotechnology, toxicologists, pharmaceutical scientists, environmental scientists and agriculturists.