In recent decades, few disciplines have experienced the explosion of knowledge and research that genetics has. Inspired in part by controversies and the publicity that this new information generates, many of today's students come to a course in genetics with great enthusiasm. Sustaining this enthusiasm while at the same time teaching students about the beauty, logical clarity, and unity of the subject can be a challenge for any teacher. In the fourth edition of Genetics: Principles and Analysis, Dan Hartl and Beth Jones have written a text that will provide you and your students with a clear, comprehensive, rigorous, and balanced introduction to genetics at the college level. It is a guide to learning a critically important and sometimes difficult subject. But the tools for learning extend beyond the confines of the textbook. Your students will have the opportunity to become active participants in the learning process by making full use of today's teaching and learning technology. Developed as an integrated and unified program, no other textbook will engage your students and connect them to the subject of genetics like Hartl/Jones.