An analysis of the genomes of more than 3,600 individuals from the United States and other countries found that the average IQ of those with the genome variant increases over time, and that it also increases with age.
This, the researchers say, may be because people with this mutation have a greater ability to make complex and adaptive choices and to learn new things, including language and social skills.
“There are many genes that contribute to intelligence, and these findings are an important step in understanding how these genes affect cognition,” said the study’s lead author, Andrew Weil, a postdoctoral fellow at the Institute of Medical and Behavioral Genetics at the University of Illinois at Chicago.
“The human genome has changed over the years, and there are many ways to increase your intelligence, but the question is how does the genetic change affect your intelligence?”
The study was published online in the journal Nature.
The researchers analysed the genomes from more than three million people across the US, Europe, Japan and Canada.
The analysis included people who had been followed since birth, or those who had completed a childhood or adolescent health test, and who had participated in various cognitive and learning tests.
The scientists analysed the participants’ genomes in detail to determine their genes’ effect on cognitive ability.
“We can look at a particular genetic variant and say, ‘This variant has changed in your genome, and the gene that controls this has increased over time,'” said Weil.
“That’s a very interesting way to look at it.”
Our genes influence our cognitive ability Our study was one of the first to use data on individuals’ genomes to look for changes to cognitive ability in adulthood.
It was also the first of its kind to examine the effect of multiple variants in a single individual.
The study, however, was limited to individuals who had also participated in other cognitive tests.
“For the most part, it’s been known for years that individuals with multiple variants are more intelligent,” said Weill.
“But the study that we did shows that the effect on IQ is not necessarily a result of that single genetic variant.”
The study also showed that the number of different genes affected increased with age, and by the time people reached their late 30s, the average of the different genetic variants was about three times higher than the average age.
“You’re looking at something that’s very subtle and hard to predict,” said co-author Jennifer Tansley, a PhD candidate at the Harvard Tandon Institute for Human Genetics and Health Sciences in Cambridge, Massachusetts.
“And when we see a change in this gene in your own genome, that’s pretty significant.”
Weil and his colleagues also found that when they looked at the genetic variation of people in their own families, the people with the variants were at higher risk of having cognitive issues in later life.
“This is important because if you have a family history of schizophrenia, for example, you might have a lot of these variants,” said Tansly.
To see how the study could have affected our understanding of how cognitive abilities evolve over time and how they are influenced by our genes, the team also looked at a number of other common disorders. “
If you have this genetic variation in your DNA, you’re more likely to develop cognitive issues later in life, but your genes aren’t necessarily linked.”
To see how the study could have affected our understanding of how cognitive abilities evolve over time and how they are influenced by our genes, the team also looked at a number of other common disorders.
“Many people who have a gene variant that affects intelligence are at risk of depression, for instance, and we know that it can be associated with schizophrenia, and it is associated with attention deficit hyperactivity disorder, which is a common psychiatric disorder,” said Ouril.
The team looked at an online database of 2.8 million people, and compared the genetic variant data with their health outcomes.
“Some people are at higher and some people are lower risk for mental health problems, and those are things that are linked to their genome,” said David Gazzaniga, an associate professor of epidemiology at the Johns Hopkins Bloomberg School of Public Health and a co-researcher on the study.
“What we saw is that these genetic variants are associated with risk of mental health issues.
It’s not linked to other aspects of the genome, but it’s associated with some aspects of mental illness.
So it does suggest that we need to look more closely at how these genetic differences interact with other things in the genome.”