Individual differences in cognitive abilities in children and adolescents are partly reflected in variations in their DNA sequence, according to a study published in Molecular Psychiatry. These tiny differences in the human genome can be used together to create so-called polygenic scores; the sum of a number of genetic variants an individual carries reflecting the genetic predisposition to a particular trait. This includes differences in educational achievement (how well pupils do in English, maths, and science), how many years of education they complete, and their IQ at age 16.
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