Children inherit intelligence from the mother, not the father, according to scientists. The genes responsible for intelligence are on the X chromosome and can be disabled if they come from the father, according to The Independent.
Often, parents (especially men) used to say that the girl or boy inherited their beauty from the mother and intelligence from the father. And so, everyone is happy. Or so they think.
Well, new studies may disappoint fathers, because researchers in Glasgow (Scotland) found out that men actually do not contribute much to a child’s intelligence, the decisive factor is actually the mother.
Scientists have found that women are more likely to transmit the genes responsible for the intelligence of children, as they are ‘transported’ through the X chromosome and women have two such chromosomes, while men only have one.
In addition, researchers have now found that the genes responsible for advanced cognitive functions that are inherited from the father could be deactivated.
Experiments on laboratory mice genetically modified to show that those who received one additional dose of genes from the mother developed a larger head and a brain to match, having instead small bodies. Mice with genes from the father showed a smaller head but a larger body.
And for the situation to become even stranger for men, scientists found that cells with paternal genes, which are specific parts of the brain in mice, are responsible for sex, diet, and aggression.
Instead, researchers found no cell from the father in the cerebral cortex, the very place where the most advanced cognitive functions such as reasoning, language, and planning are happening.
Researchers from Glasgow went further and tried to find out whether experiments on mice are confirmed in humans, so they did a survey of 12 000 young people aged between 14 and 22 years old annually since 1994. Once they have taken into account other factors such as education, race, and socioeconomic status, the study authors concluded that increasing maternal IQ is affecting children’s intelligence.
However, other studies show that only about half of our intelligence is inherited, the rest depending on the environment. Even in this case, the mother plays a crucial role as a close relationship between her and the child can help to develop certain parts of the brain latter by 10% in addition to children whose mothers are more distant from the emotionally point of view, according to a team of researchers from the University of Washington.
A close connection between mother and child gives him a sense of security, which allows the child to explore the environment and solve various problems and thus developing the brain.
This does not mean that the role of fathers in the child’s rearing is zero. Other studies show that inherited paternal genes may lead to the development of intuition or emotion.