has gloss | eng: Study of the heritability of IQ is a controversial field of research that includes biology, psychology, philosophy, sociology, and anthropology. Heritability is a measure of the relative contribution of genotype to the variation of a phenotype on a given group in a specific environment. The debate about IQ heritability touches on the nature versus nurture divide, However, destructive mutation of individual genes associated with development can severely affect intelligence, with Phenylketonuria as an example. |