Answer: Heritability
Explanation: Heritability could be defined as the degree of variation in phenotypic traits(obseservable physical attributes of an organism which may include appearance, behavior and development) in a population resulting from genetic variation of individuals in that population. It is used in examining how well the difference in genetic traits account for variation in the phenotypic attributes (observed physical characteristics) of individuals within a population.
The variation in estimates for intelligence might be further affected by nutritional differences, quality of school attended, neighborhood stability, peer influence and other environmental constraint.
