The term heritability refers only to the degree of genetic variation between people on a trait. It does not refer to the degree to which a trait of a particular individual is due to environmental or genetic factors. The traits of an individual are always a complex interweaving of both.Pinker, Steven. 2002. The Blank Slate: The Modern Denial of Human Nature (1st ed.). Viking Press. . Lay summary. For an individual, even strongly genetically influenced, or "obligate" traits, such as eye color, assume the inputs of a typical environment during ontogenetic development (e.g., certain ranges of temperatures, oxygen levels, etc.).
The term heritability refers only to the degree of genetic variation between people on a trait It does not refer to the degree to which a trait of a particular individual is due to environmental or genetic factors The traits of an individual are always a complex interweaving of bothPinker Steven 2002 The Blank Slate The Modern Denial of Human Nature (1st ed) Viking Press  Lay summary For an individual even strongly genetically influenced or "obligate" traits such as eye color assume the inputs of a typical environment during ontogenetic development (eg certain ranges of temperatures oxygen levels etc)