Which part of our genetic factors will be passed on to children?
First, can intelligence be inherited?
This is hereditary.
40% of childhood IQ is determined by genetic factors. If both parents are high IQ people (IQ > 125, accounting for less than 5% of the population), then there is a high probability that the child is also high IQ.
There are some differences in IQ among different nationalities. For example, the average IQ of Jews is between112 ~115, which is higher than other nationalities. 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.
However, the development of the brain is much more complicated than the development of height (bone). 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:
1. Both father's and mother's genes have an influence on the formation of children's intelligence, and the mother may be slightly older.
2. Intelligence depends not only on congenital factors, but also on acquired family environment and school education.
IQ is determined by many factors, both genetic and environmental factors are very important. 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.
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Second, will height be inherited?
This is hereditary.
According to estimates, 60% ~ 80% of the height difference is determined by genes, and the remaining 20% ~ 40% is attributed to environmental factors (such as acquired nutrition).
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 daughter Yao Qinlei is 7 years old and nearly 140 cm tall. 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. Nowadays, many high school students and high school students are much taller than their parents of the same age. One of the most important reasons is that the diet nutrition is much better than before.
Third, can obesity be inherited?
This is hereditary.
The results of epidemiological studies tell us that obesity is closely related to heredity. If both parents are obese, then their children have an 80% chance of being obese; On the contrary, if the weight of both parties is normal, then the probability of children suffering from obesity does not exceed 10%.
In the history of human evolution, it may be a good thing to carry the obesity gene. For example, before the 20th century, most people didn't have enough to eat, so food should be stored as fat. But now that our life is better, the obesity gene often means a higher risk of cardiovascular disease, so let yourself be thinner!
4. Can color blindness be inherited?
It is hereditary and related to gender.
There are many kinds of color blindness, including color blindness and partial color blindness. The common one is red-green color blindness in partial color blindness, that is, it is impossible to distinguish red from green.
Red-green color blindness is a recessive genetic disease of X chromosome, which has two characteristics:
1. Related to gender
Men are far more red and green-blind than women.
2. Recessive inheritance
This means that both parents have normal vision and the child may be color blind. If a mother is color blind, her daughter has a 50% chance of being color blind, and her son must be color blind.
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5. Will breast size be inherited?
This is hereditary.
According to the statistics of twin population, the genetic correlation of * * * figure is about 50% ~ 60%, which shows that the relationship between female * * figure and mother is still relatively large. Heredity, age, breastfeeding and fatness will all affect the size of * *, and genetic factors are a key point.
For adult women, it is useless to change the size of * * * in a short time (except lactation) and eat papaya. The only effective way may be plastic surgery.
6. Will hair loss be hereditary?
Not strictly confirmed.
There is a common saying that hair loss is "maternal inheritance". If all the men in the mother's family (such as grandpa and uncle) are bald, then the child may lose his hair. But this statement has not been strictly confirmed by medicine at present.
At present, the genetic law we know is that the genes of hair loss come from both parents, and hair loss is determined by multiple genes and environment. In other words, even if parents don't lose their hair, children may lose their hair. Fortunately, there are still ways to control hair loss. The sooner you treat it, the better. If you have the potential to be a "real man", you should see a dermatologist as soon as possible!