According to several studies, intelligence genes come from the mother’s side. If you are a women who is looking to have a baby on your own, there is no point wasting your time looking for an intelligent male profile in the sperm bank!
Mother’s genes in the cerebral cortex
Several studies have revealed that intelligence genes are found in the X chromosome that is transferred to the child by the mother. This is why children inherit their intelligence from their mother.
In 1984, the first study carried out by the University of Cambridge proved this to be the case following several studies on the subject. Researchers discovered that embryos of mice which had received a supplementary dose of maternal genes developed a bigger brain and head, with a little body. On the contrary, the mice that received a supplementary dose of the parental genes developed a smaller head and a bigger body.
Another study lead by the psychologist Robert Lehrke, revealed that a major part of a child’s intelligence depends on their X chromosome. However women have two X chromosomes, and according to the author of this study they have two times the chance of transferring characteristics connected to their intelligence to their children.
Researchers from the University of Ulm in Germany found that genes involved in the majority of cerebral lesions, particularly those connected to cognitive capacities where found in the X chromosome.
According to a study conducted by the Social Sciences and Public Health Unit in Glasgow, Scotland, the IQ of children and their mothers is very similar, varying by 15 points on average compared to their mother. To reach this conclusion, researchers interviewed 12,686 young people aged 14 to 22 each year for several years, while taking into account factors such as skin color, education or socio-economic status.
Genetics is not the only factor that creates intelligence
Studies have revealed that the mother plays an important role in the intellectual development of children but not only by the genes that they transfer. The emotional connection that is created by the mother with their child through their physical and emotional contact is meant to be directly linked to the development of the child’s intelligence.
Researchers from the University of Minnesota, USA stated that children that feel loved by their mother and those who are close to her develop the ability to play more complex games and are able to solve problems by the age of two.
This strong link gives children the security and confidence that is necessary to tackle social situations and solve problems, especially when the mother is there to help and support the child to solve the problem in their early years. The importance of this emotional relation for the child’s brain development has been proven by researchers from the University of Washington. According to their results, when the mother meets the intellectual and emotional needs of her children, the volume of their hippocampus at the age of 13 is 10% higher than that of children with emotionally distant mothers. In the brain, the hippocampus is associated with memory, learning, and stress response.
Of course, we can assume that when the relationship with the father is just as fully developed as the relationship with their mother, the chances of the child developing a higher IQ are multiplied, even if studies remain to prove this theory!
In conclusion, even if a child has a high IQ, their intelligence must be challenged regularly. They need to practice their skills and be affronted with new and more difficult challenges as their brains risks becoming stagnate.