Research on genetic factors in human intelligence has used __________ studies.
A)twin
B)adoptee
C)kinship
D)all of these

Question

Quizplus · Accepted Answer

Genetic studies on human intelligence have used all three types of studies - twin studies, adoptee studies and kinship studies. Twin studies compare similarities in intelligence between monozygotic (identical) and dizygotic (fraternal) twins to estimate the contribution of genetics. Adoptee studies compare the intelligence of adopted children with their adoptive and biological parents to tease apart the effects of genetics and environment. Kinship studies compare the intelligence of relatives with varying degrees of genetic relatedness to infer the role of genetics in intelligence.

Research on Genetic Factors in Human Intelligence Has Used __________