Take the Yao Ming family as an example. Yao Ming is 226 cm tall, Yao Ming's wife Ye Li is 190 cm tall, and Yao Ming's 7-year-old daughter Yao Qinlei is nearly 140 cm tall. According to estimates, 60% ~ 80% of the height difference is determined by genes, and the remaining 20% ~ 40% is attributed to environmental factors.
In addition, ethnic differences determine the probability that height is affected by genes. For example, the probability that the height of Asians is affected by genes is about 65%, which is lower than that of whites in Europe and America. This is also the reason why some people fail to use the formula of "parents' height to infer children's height" Of course, in addition to genetic factors, acquired nutrition and exercise will also affect people's height. Many junior and senior high school students born after 00 in China are much taller than their parents of the same age. The important reason is that their diet and nutrition are much better than before.
Like height, IQ is determined by many factors, both genetic and environmental factors are very important. There are some differences in IQ between different races. For example, the average IQ of Jews is between112 ~115, which is higher than other races. This is also one of the important reasons why Jews, who account for only 0.2% of the human population, won the 20% Nobel Prize.
40% of childhood IQ is determined by genetic factors. If both parents are high IQ people, then there is a high probability that their children are also high IQ. However, the development of the brain is much more complicated than the development of height. At present, the medical community is not clear about the specific physiological mechanism and cannot control the development of intelligence. We only know two things for sure:
Both father's and mother's genes have an influence on the formation of children's intelligence, and the mother may be slightly older. Intelligence depends not only on innate factors, but also on the acquired family environment and school education.
Therefore, in order to make children smarter, parents should not be stupid, but also create a good family atmosphere and learning environment for their children. Don't forget, everything your parents say and do is actually the starting line.