Which parent's IQ will the first child inherit? Why is the second child smarter than the first child?

When a baby is born, the most discussed question is whether he or she will look like the father or the mother. In fact, intelligence is not as simple as we think. Although intelligence is hereditary, it is also affected by acquired factors such as environment, nutrition, and education.

Which parent's IQ will the first child inherit?

Regardless of whether it is the first child or the Nth child, leaving aside factors such as acquired education and nutrition, and only talking about genetic factors, the influence of genetics on intelligence will account for about 50%-60%.

Most of the genes related to intelligence are concentrated on the X chromosome. Women have two X chromosomes, while men have only one. Therefore, the mother's intelligence gene plays an important role in the genetic factors of intelligence. Therefore, if the mother is smart, most of the children she gives birth to will be smarter.

Why is the second child smarter than the first child?

Generally, the second child of the same gender is smarter and more capable than the first child. This is not caused by genetic genes, but has a lot to do with the environment the child lives in. As the saying goes, if you raise the first child according to the book, the second child will be raised like a pig. This is the true portrayal of many families, especially in our family. The first child has everything, and his parents revolve around him. He also has all the delicious and fun things. The second child faces a competitive environment when he is born, and he has to fight for everything. Therefore, the first child is basically generous and peaceful, while the second child likes to compete and is likable. People feel that the second child is smarter than the first child. In fact, it is due to the environment, and has nothing to do with genes.

Is IQ greatly influenced by genetics?

Scientists have done a lot of research and they believe that the effect of genetics on children's intelligence is objective but not absolute. The influence is at most 50% to 60%, and the rest is related to acquired development.

I have heard this saying: if the mother's IQ is higher than the father's, then she will definitely give birth to a boy, and the boy's IQ will be the same as the mother's;

If the father's IQ is higher than the mother's, then a girl will be born, and the girl's IQ will be the average of the father and mother.

This means that humans are constantly optimizing, so they can only inherit better genes. But this statement is not scientific.

Related News

If it's a boy, he'll be smarter, but if it's a girl, her intelligence may be the average of both parents.

If a boy thinks he is stupid, he must marry a smart girl, then the chances of his baby being smart will be higher.

However, intelligence is not completely stable and unchanging during the inheritance process.

Generally speaking, a child's IQ is usually close to that of his or her parents, but not exactly the same. Children born to parents with high IQs will have an IQ that is relatively higher than that of ordinary people, or close to the average IQ of ordinary people, while children born to parents with low IQs will have a relatively low IQ.