Heredity
Passing of traits to offspring from the species' parents or ancestor
Heredity, also called inheritance or biological inheritance, is the passing on of genetic information from parents to their offspring. It may occur through sexual or asexual reproduction, where new cells are produced from either individual cells underdoing cell division or two cells combining genomes, respectively. Through heredity, genetic variations in populations can accumulate and cause species to evolve by natural selection.
From Wikipedia, under CC BY-SA. More on occurri.