EXCERPT

They analysed thousands of genes expressed in the human brain, and then combined the results with genetic information from healthy people who had undergone IQ tests and from people with neurological disorders such as autism spectrum disorder and intellectual disability.

They conducted various computational analyses and comparisons in order to identify the gene networks influencing healthy human cognitive abilities. Remarkably, they found that some of the same genes that influence human intelligence in healthy people were also the same genes that cause impaired cognitive ability and epilepsy when mutated, networks which they called M1 and M3.

SOURCE

http://www.telegraph.co.uk/news/science/science-news/12061787/Intelligence-genes-discovered-by-scientists.html