The genetics of nearly 80,000 people, researchers have uncovered 40 genes that may make certain people smarter. That brings the total number of suspected intelligence genes to 52.
But studying these genes many of which play roles in brain cell development. It helps scientists to understand how intelligence is built into brains.
Identification of genes
Moreover, intelligence research mired in controversy, says neuroscientist Richard Haier of the University of California, Irvine. Genes anything at all to do with the trait, opposed to education and other life experiences. But now “we are so many light-years beyond that, as you can see from studies like this,” says Haier. “This is very exciting and very positive news.”
The technique pointed out particular versions of 22 genes. Half not known previously to have a role in intellectual ability. Identified a 30 more intelligence genes using different technique only one of which previously found. Many of the 40 genes newly linked to intelligence and thought to help with brain cell development. The SHANK3 gene, for instance, helps nerve cells connect to partners.
Together, the genetic variants identified in the GWAS account for only about 5 percent of individual differences in intelligence. It means the results, if confirmed, would explain only a very small part of why some people are more intelligent than others.
Before scientists could change genes to increase intelligence, they’d need to know everything about the entire process.