Because male hair loss is obvious, as long as the offspring lose their hair, it is easy to think that this is inherited by the father. In fact, this statement is really wrong. According to serious scientific theory, most hair loss is actually inherited by mothers.
At present, the genetic mechanism of hair loss has almost been confirmed. For men, the inheritance of hair loss is dominant, while for women, the inheritance of hair loss is recessive. According to Mendel's classical genetic law, it is assumed that A is a gene that does not lose hair and A is a gene that loses hair. There are the following situations:
M: aa and Aa both lose their hair, but AA doesn't lose it.
Woman: aa, Aa doesn't lose hair, only AA does.
The probability of male hair loss is naturally greater than that of female hair loss, and even if women lose their hair, they will not be bald, and the possibility of male baldness is great! Then, let's look at the genetic situation. If we know Mendel's genetic law, then the situation of hereditary alopecia is easy to calculate. If you don't know enough, here is a direct result for you.
The first case: the father does not lose hair, and the mother does not lose hair. The offspring is male, and the probability of hair loss is
The second case: the father loses his hair, but the mother doesn't. The offspring are male, and the probability of hair loss is about 70% or more; The offspring are women, and the probability of hair loss is only about 15%. (This situation is the most complicated and only an approximation. )
The third case: the father does not lose hair, the mother loses hair, and the offspring is male, and the probability of hair loss is as high as100%; The offspring is female, and the probability of hair loss is 0%.
The fourth case: the father loses his hair, the mother loses his hair, the probability of hair loss is still 100%, and the probability of hair loss is about 75%.
What is the conclusion? Even if both parents lose their hair, the offspring will not necessarily lose their hair; Even if parents don't lose their hair, their offspring may lose their hair. In other words, you can't predict the next generation according to your parents' current hair condition. You can only say that people whose parents have hair loss or one of them has hair loss will increase the possibility of hair loss in their offspring.
What will happen to children with hereditary hair loss in the future?
Children with the same genes are different from men and women, and the fate of hair loss is different in the future. In reality, we rarely see that female hair loss can develop into baldness, while male baldness is everywhere. Why? Because the severity of hair loss depends not only on the hair loss gene, but also on the androgen in the body. Women's androgens are generally low, so hair loss will not be too serious. Even some women may not see hair loss even if they really have hair loss genes.
Someone asked, my father and mother don't lose their hair. Why do I lose my hair? On the one hand, you have a chance to lose your hair. On the other hand, just because your mother doesn't lose her hair doesn't mean she doesn't have a hair loss gene. Maybe your hair loss problem is inherited from your mother who doesn't lose hair.
There is hereditary alopecia, how to solve it?
If it has been confirmed that it is hereditary alopecia, can it be saved? First of all, we should know that any disease involving genes will be very troublesome, which is a forbidden area that human beings have not yet overcome. The same is true for hair loss. Hair loss genes cannot be changed, so we can only make a fuss about androgens. Now some drugs can relieve hair loss by inhibiting androgen, such as propafenone. Long-term use can slow down the degree of hair loss, but it can't cure it. Because androgens are constantly produced in the body, the inhibitory effect needs constant pressure test. Once it stops, the hormone level will recover quickly and the hair loss will return to its original state soon.
Another method is hair transplant. In the most popular words, hair transplantation is to transplant hair follicles without "hair loss genes" to hair loss areas. Because the hair follicle itself does not contain the "hair loss gene", it does not care about the problem of androgen. The effect of hair transplantation can last for a long time, which is the biggest advantage of hair transplantation.
In the early stage of hereditary alopecia, the function of hair follicles was not greatly affected. Taking medicine at this time and paying attention to life and rest can slow down the time of hair loss. Some people even have symptoms of hereditary hair loss after 40 years old. Therefore, for the problem of hair loss, it is important to prevent it. If there is a trend, it should be treated as soon as possible! If unfortunately hereditary alopecia is already serious, you should consult a professional. The common methods, shampoos and drugs promoted on TV are basically ineffective.