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Continue to ChatNo one has found a gene for IQ. "Heritability" means that identicial twins are more similar than fraternal twins, right? Fraternal twins more similar than non-siblings. The heritability is 50 percent if your parents went to college. But if your parents never graduated high school the heritability is zero. Zero. - Jerome Kagan from https://whatsmyquote.com/quote/no-one-has-found-a-gene-for-iq-heritability-means-that-identicial-twins-are-more-similar-than-fraternal-twins