Resumen de Finding the players in the symphony of IQ genes
The biggest-ever search for genes that affect intelligence, and the first to give reproducible results, has found 10 variations in deoxyribonucleic acid (DNA) that seem to influence intelligence--but not by much. Studies of families show intelligence is 40 to 50% inherited, and otherwise depends on environment. Since mass-analysis of DNA variations became possible, a number of studies have sought the genes involved in this inheritance, and some papers have claimed strong associations between particular genes and IQ. Yet results have varied widely and none have been replicated
