heritability

Definition of heritability

heritability

(HAYR-ih-tuh-BIH-lih-tee)
The proportion of variation in a population trait that can be attributed to inherited genetic factors. Heritability estimates range from 0 to 1 and are often expressed as a percentage. A number close to 1 may be indicative of a highly heritable trait within a population. It should not be used to estimate risk on an individual basis.

Source: NCI Dictionary of Cancer Terms