Who determines a child's IQ?

We all hope to have a lovely child. According to the characteristics of human genetics, both men and women hope to make their offspring smarter by finding a smarter partner. This is a selection behavior of survival of the fittest. However, with the development of science and technology, people have a better understanding of the scientific nature of genetics and are no longer as blind as before. So, who determines a child's IQ?

Intelligence is somewhat hereditary, but is also influenced by acquired factors such as environment, nutrition, and education. According to scientists, genetics accounts for about 50%-60% of the influence on intelligence. In terms of genetics, if the mother is smart, the child she gives birth to will mostly be smart. If it is a boy, he will be even smarter. The reason for this is that the genes related to human intelligence are mainly concentrated on the X chromosome. Women have two X chromosomes and men only have one, so the mother's intelligence plays a more important role in heredity.

Boys are XY, so all their IQ comes from their mother's genes. Girls are XX, so their IQ is influenced half by their father and half by their mother.

Because a girl's IQ is influenced by both her father and mother, there will be a neutralizing effect. Therefore, the distribution of girls' IQ will show a normal distribution, which is an inverted bell shape, with the most in the middle and less on both sides.

Then, because boys are completely influenced by only one side, the distribution of boys' IQ tends to be biased towards two extremes. In other words, there are more geniuses among boys, but at the same time, there are also more idiots among boys. Who does a child inherit his IQ from?

What is a toxic working environment? For example, the radiology department of a hospital and a chemical plant, these places will have an impact on the health of the fetus. Even if you work in an ordinary office, printers, copiers, and computers will have a certain amount of radiation. Although the radiation is small, it is better not to be exposed to it for a long time. It is also important to avoid secondhand smoke.

Some women who love beauty are worried that weight gain after pregnancy will affect their body shape and it will be difficult to recover after giving birth. Therefore, they choose to diet or take oral medication to lose weight before pregnancy. This practice is extremely unscientific. Even if you are not pregnant, the mother needs nutritional reserves during the pregnancy preparation period. Dieting will cause a lack of vitamins and minerals, which will naturally affect the growth and development of the fetus. The use of drugs is not allowed.