Genetics is a field of study which generally comes under the branch of biology but sometimes it is closely related to information systems and life sciences. It refers to the study of genes, genetic variation and heredity in living beings. It has many branches namely evolutionary genetics, ecological genetics, human genetics, microbial, molecular and medical genetics, etc. This book traces the progress of this field and highlights some of its key concepts, theories and applications. It contains some path-breaking studies in this field. It includes the topics which are of utmost significance and are bound to provide incredible insights to the readers. Coherent flow of topics, reader-friendly language and extensive use of case studies make this book an invaluable source of knowledge and a beneficial guide of reference for both academicians and students.