QUANTITATIVE GENETICS, MOLECULAR-GENETICS, AND INTELLIGENCE

Growing acceptance of the conclusion that genetic influence on intelligence is significant and substantial is only the first chapter in the story of genetics and intelligence. Much remains to be learned about basic quantitative genetic issues: about nature (e.g., developmental and multivariate phenomena); about nurture (e.g., nonshared environment); and about the interface between nature and nurture (e.g., genetic influences on intelligence-related environmental measures). Most exciting is the potential application of molecular genetic techniques that will revolutionize quantitative genetic research on intelligence by identifying specific genes that contribute to genetic influence.