Fundamentals of Genetics is a text book for Under Graduate level study. In order to study advanced genetics it is vital to learn basic concepts in genetics. Hence the book retain its focus on basic idea about the subject. To better understand the advanced genetics let's turn back in past and look at how scientists came to learn about concepts in genetics. This book is divided into 09 chapters starting from history of genetics to the chromosome structure and their inheritance pattern. All the concepts in a book are interpreted in simple language so that everybody can understand very easily. I hope this book will help Under Graduate students to learn some interesting things in genetics.