IQ (as one imperfect measure of intelligence) is significantly hereditary. <quote> Various studies have found the heritability of IQ to be between 0.7 and 0.8

IQ (as one imperfect measure of intelligence) is significantly hereditary. <quote> Various studies have found the heritability of IQ to be between 0.7 and 0.8 in adults and 0.45 in childhood in the United States.[4][7][15] It may seem reasonable to expect that genetic influences on traits like IQ should become less important as one gains experiences with age. However, that the opposite occurs is well documented. </quote> http://en.wikipedia.org/wiki/Heritability_of_IQ http://en.wikipedia.org/wiki/Heritability_of_IQ