IQ-DNA connection deepens: 40 genes identified that contribute to intelligence

| | May 24, 2017

The research on 60,000 adults and 20,000 children uncovered 40 new genes that play a role in intelligence, a haul that brings the number of genes known to have a bearing on IQ to 52.

Previous work with twins has shown that genes account for about half of the difference that is seen in IQ scores across the population, with the rest being shaped by factors such as conditions in the womb, nutrition, pollution and a person’s social environment. “Genes do not determine everything for intelligence,” said [Danielle Posthuma, a statistical geneticist at the Free University of Amsterdam]. “There are so many other factors that affect how well someone does on an IQ test.”

It is thought that hundreds, if not thousands, of genes play a role in human intelligence, with most contributing only a minuscule amount to a person’s cognitive prowess. The vast majority have yet to be found, and those that have do not have a huge impact. Taken together, all of the genes identified in the latest study explain only about 5% of the variation in people’s IQs, the scientists found.

[Read the full study here.]

The GLP aggregated and excerpted this blog/article to reflect the diversity of news, opinion, and analysis. Read full, original post: Scientists identify 40 genes that shed new light on biology of intelligence

The GLP aggregated and excerpted this article to reflect the diversity of news, opinion, and analysis. Click the link above to read the full, original article.
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