Definition.com
Heredity is the transmission of unpleasant characteristics from the other side of the family.
Definition.com
Heredity is transmitted by both parents: many a girl is the picture of her father and the sound track of her mother.
Definition.com
Heredity is contrasted with environment in that heredity is when you wind up with your mother's complexion while environment is when you wind up with your father's car.
Meme.com

See also
.com