A new research in Britain and America has discovered 500 genes linked to human intelligence. Researchers from the universities of Edinburgh, Southampton and Harvard, led by epidemiologist David Hill, who published the journal Molecular Psychiatry, according to New Scientist and Telegraph, analyzed data and compared DNA above 240,000 people.
They thus identified 538 genes and 187 regions of the genome associated with mental capacity. Some of these genes have already been linked to other things, such as longevity. The “witty genes” – at least some of them – seem to improve the transmission of signals between neurons in different regions of the brain and, in addition, protect against dementia and premature death.
As Hill said, “people with a higher level of mental functioning also tend to have better physical health and live longer.” Despite the discovery of these genes, it is still difficult to predict a child’s intelligence by analyzing his DNA according to the Athenian-Macedonian News Agency.
When scientists used the genes they found to predict the intelligence of a group of other people, they were able to predict only 7% of the differences between them in terms of the intelligence index. Even so, to a small extent, this is the first time that scientists have said they were able to predict the intelligence index, based on a sample of saliva or blood taken to analyze genetic material.
Scientists estimate that 50% to 80% of differences in general intelligence among people have a genetic basis, while the rest is related to upbringing, education, and more generally to the environment. Children who grow in a safe, nutritious environment without being exposed to high levels of pollution and who are treated with many stimuli perform better in clever tests and a higher IQ score.