Known for its focus on conceptual understanding, problem solving, and practical applications, this bestseller strengthens problem-solving skills and explores the essential genetics topics that today's students need to understand. The Ninth Edition maintains the text's brief, less-detailed coverage of core concepts and has been extensively updated with relevant, cutting-edge coverage of emerging topics in genetics. The accompanying MasteringGenetics online homework and assessment system has been updated with over 100 practice problems and an expanded selection of assignable end-of-chapter problems.