Heredity Carrier is a term used to describe an organism that carries genetic material from one generation to the next. A GENE is a unit of heredity that is passed from parent to offspring and is made up of DNA. Genes are responsible for the physical characteristics of an organism, such as eye color, hair color, and height. They also determine how an organism will respond to its environment. Heredity Carriers are essential for the survival of species, as they ensure that the genetic information is passed on to future generations.