Genetic aspects of intelligence.
D004777:Environment; D005260:Female; D005838:Genotype; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D010641:Phenotype; D011247:Pregnancy; D044469:Racial Groups; D012923:Social Class; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic