Welcome to the comprehensive guide for IGNOU's BZYCT-137: Genetics and Evolutionary Biology, a crucial paper for your Bachelor of Science (General) program under the CBCS system. This course delves into the fundamental principles that govern heredity and the fascinating journey of life's diversification over millions of years. Understanding genetics is paramount as it forms the bedrock of modern biology, impacting fields from medicine and agriculture to conservation. Evolutionary biology, on the other hand, provides the historical context and the driving forces behind the incredible biodiversity we see today. This course will equip you with a solid understanding of Mendelian genetics, molecular genetics, population genetics, and the mechanisms of evolution such as natural selection, genetic drift, and speciation. You'll learn how genetic variations arise and are passed down, and how these variations, coupled with environmental pressures, lead to evolutionary change. The relevance of these topics is vast, opening doors to careers in genetic counseling, research, biotechnology, environmental science, and more. To excel in your BZYCT-137 exam, it’s essential to grasp both theoretical concepts and their practical applications. Our collection of 27 past IGNOU question papers, spanning multiple exam sessions including January 2026 and July 2026, will be invaluable. These question papers are not just practice tools; they are insights into the exam pattern, marking scheme, and the types of questions you can expect. We also offer comprehensive study materials designed to complement your learning journey. By thoroughly reviewing these resources and practicing with previous question papers, you can build confidence and achieve academic success in Genetics and Evolutionary Biology.