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>>11408895

From Wikipedia:

>The heritability of IQ for adults is between 57% and 73%[5] with some more-recent estimates as high as 80%[6] and 86%.[7] Genome-wide association studies have identified inherited genome sequence differences that account for 20% of the 50% of the genetic variation that contributes to heritability.[8] IQ goes from being weakly correlated with genetics, for children, to being strongly correlated with genetics for late teens and adults. The heritability of IQ increases with age and reaches an asymptote at 18–20 years of age and continues at that level well into adulthood. This phenomenon is known as the Wilson Effect.[9] Recent studies suggest that family and parenting characteristics are not significant contributors to variation in IQ scores;[10] however, poor prenatal environment, malnutrition and disease can have deleterious effects.[11][12]