Genetics is the study of genes genetic variation & heredity in living organisms. Heredity is a biological process where a parent passes certain genes on to their children or offspring. Every child inherits genes from both of their biological parents & these genes in turn express specific traits. It is the genes that govern the development of character of an individual. Knowledge about genes is very important to students majoring in a number of disciplines including biology agriculture medicine chemistry engineering psychology and wildlife. Therefore this text book can contribute a lot to giving full information for academia about basics and applications of genetics.