Heredity is the study of the transmission of genes from parents to offspring and the laws governing such a transmission. Along with genetic characters, variations also appear during the transmission. Branch of biology that deals with the study of heredity and variations are called genetics.

The branch of biology that deals with the study of heredity and variations are called genetics. The term was coined by Bateson (1906). Gregor Mendel, known as the "father of genetics" .

Variations are the differences in the characteristics between the parents and the offsprings and among the individuals of the same species. The accumulation of variations leads to evolution.