What chromosomes is the hair loss gene on, now medically

Common hair loss genes are complex (other special types are not excluded) and are autosomal but can be affected by sex hormones.

In men, under the influence of male hormones, the hair loss gene will be dominant, that is, if you have a hair loss gene, it will be over.

In women, on the other hand, only a pair of alleles are alopecia and will be expressed.

As for leg hair, I don't know much, there should be many alleles, I hope it helps, thank you for male pattern baldness does not occur in groups that do not carry the baldness gene; This genetics are inherited from one of the parents; It is more likely to be inherited from the maternal side, and in general, 70% of the inheritance of hair loss comes from the mother and 30% from the father.

Autosomal.

It is a recessive genetic disease.

At present, the mechanism of hair loss inheritance has almost been confirmed, for men, hair loss inheritance is dominant, for women, hair loss inheritance is recessive inheritance. According to Mendel's classical law of heritability, assuming that a is a gene for non-hair loss and a is a gene for hair loss, then there are several cases: Male:

AA and AA both have hair loss, and AA does not lose hair. Women: AA, AA does not have hair loss, only AA hair loss.

The odds of hair loss in men are naturally greater than in women, and even women will not go bald, while men have a high chance of baldness! Then, let's take a look at the genetic situation, if you know Mendelian hereditary laws, then this genetic alopecia situation 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 his hair, and the mother does not lose his hair. The offspring are male, and the chance of hair loss is < 25%; The offspring are female, 100% hair-free. The second scenario:

The father loses his hair, but the mother does not lose his hair. The offspring are male, and the chance of hair loss is about 70% or more; The offspring are female, and the chance of hair loss is only about 15%. (This case is the most complicated, only approximate values are taken) Third case:

The father does not lose his hair, the mother loses his hair, and the offspring is a man, and the chance of hair loss is as high as 100%; The offspring are female, and the chance of hair loss is 0%. The fourth case: the father has hair loss, the mother also has hair loss, the offspring is a man, the chance of hair loss is still 100%, and the offspring is a woman, the chance of hair loss is about 75%.

What is the conclusion? Even if both parents have hair loss, there is a possibility that the offspring will not lose their hair; Even if both parents do not lose their hair, their offspring may lose their hair. In other words, you can't ** the next generation based on the current hair condition of the parents, you can only say that the parents have hair loss or people who have one of the hair loss of the offspring, the possibility of hair loss in the offspring will increase.

Since the hair loss caused by the previous generation is accounted for a certain proportion of the data, if your parents have severe hair loss symptoms, it is important to pay attention to your hair health problems as soon as possible. Starting with basic daily care products, friends with oily hair can choose oil balancing lotion to cleanse hair and balance the secretion of sebaceous glands; If you have a lot of dandruff and dry hair, use a moisturizing anti-dandruff lotion to deeply cleanse the scalp and achieve the effect of anti-dandruff and moisturizing.

Ultraviolet rays in sunlight can cause damage to the hair, making the hair dry and yellow; The warm and humid air of the air conditioner and the cool breeze can be the cause of hair loss and green hair, and too dry air or too much humidity can be bad for hair maintenance. It's not bad to read the "Dong Jujun, Diary", and when I see his story, I choose to believe it, learn to do it, and my hair will increase.

Try to sleep no less than 6 hours a day and develop the habit of sleeping regularly. Pay attention to the nutrients in your diet, eat foods rich in protein and trace elements, eat more vegetables and fruits, and eat less greasy and sugary foods.

Hello, there are many hair loss, and hereditary hair loss is more common, it is generally believed that male hair loss in the father is likely to be passed on to the children, but if the mother suffers from more severe male hair loss, the son will be more likely to lose hair. According to your family's situation, you also have a certain chance of suffering from hereditary hair loss, so you must pay attention to protection.

Hereditary alopecia means that parents have hair loss, and children also have a certain probability of being inherited, and it will appear at a certain age.

The problem of hair loss should not be underestimated, and the following points should be paid attention to in order to make new hair grow back.

aRelax properly and don't be too stressed.

b Ensure rest time, staying up late hurts the body and is not conducive to hair growth.

c. In terms of diet, we should also pay attention to comprehensive nutrition, eat more protein, beans or foods such as black sesame walnuts, and eat some fruits to supplement vitamins after meals.

When shampooing, use some Silk Wood Essence, twice a day, and continue to do it for a period of time, and your hair will be improved.

In other words, if your parents or grandparents have hair loss, then you may experience this situation. If you're a boy, there's probably no hope of getting rid of it. It's not a disease, but it's really painful to fall off, mainly on the psychological level, turning into a Mediterranean, bald head.

Women generally do not lose their hair, and female hair loss may be due to physiological reasons, so it is good to regulate it, but men cannot. So you see a lot of men losing their hair, but you don't see women losing their hair.

Androgenetic alopecia is considered an autosomal dominant disorder. In other words, if (males) carry this gene, they will definitely be bald, and of course it may vary in severity. If a woman has this gene, it is not necessary to lose hair, but it is possible to pass it on to the next generation.

So that's the essence of the problem: men carrying hair loss genes can be seen (dominant inheritance), while women carrying hair loss genes are generally not visible. So when it comes to heredity, it's not necessarily the father's cause.

We hypothesize the gene for hair loss as a and the gene for non-hair loss as a. Only AA men do not lose their hair, and AA and AA men will lose their hair; So for women, only AA women have hair loss, AA, AA women will not lose their hair, and now everyone can clearly see this problem: men are born with much higher hair loss than women.

Here are a few suggestions that I hope will help: the weather is dry in autumn, and the scalp is prone to nutrient deficiencies; Wear hats as little as possible to keep the pores of your hair open; Pay attention to light diet and don't stay up late; Adjust body functions and give hair a good environment for growth. By the way, take a look at "Dong Jue".

Jun Diary", according to the article, after more than a month of hard work, the hair grew back again.

Beef is rich in iron, which is an important nutrient for healthy hair growth. Some professionals have pointed out that one of the symptoms of iron deficiency anemia is loose hair. However, lean meat such as beef is not recommended to be eaten too much, and eating beef once or twice a week can meet the needs of the human body.

1. What is hereditary alopecia?

Hereditary alopecia is caused by androgen receptors (AR), androgens affect gene expression in hair follicle cells, and AR genes are localized on the X chromosome, and their protein activity is expressed through the number of glutamine (GLN) repeats in the protein sequence.

If the number of GLN repeats in the male AR protein is less than 21, the probability of suffering from androgenetic alopecia (caused by excess androgens) in men is nearly 97, and the probability of androgenetic alopecia in women is higher than 96, while the number of GLN is greater than or equal to 26, and the probability of no hair loss is 80.

2. The genetic law of hereditary alopecia.

In general, 70% of the hereditary hair loss comes from the mother and 30% from the father. Surveys of family members of many patients have found that there are significantly more men than women in a family who suffer from the disease. When a man is bald, his daughters are generally not bald, and many of his sons are bald.

If a woman is bald, her son is generally bald, but her daughter is not obvious. This means that this type of hair loss is inherited from a pair of alleles.

3. Manifestations of hereditary alopecia.

Hereditary hair loss caused by hormones generally begins around the age of 20, and due to the pressure of going to school or going to work, there are many other factors that cause hair loss in addition to genetic factors. Most of them have M-shaped hair loss (starting from the sides and slowly moving back), and a small number have O-shaped hair loss (starting from the top of the head). Due to too much androgen secretion, the hair is often very oily, and the face also has more oil secretion, and some boys will cause acne if they don't pay attention to facial cleaning, and the same is true for female friends.

4. Detection of hereditary alopecia.

Want to know what to do with hereditary hair loss**? In fact, problems like hair loss are prevention-oriented, as soon as possible to do a screening test on your hair health, you can determine whether you will have the possibility of hereditary hair loss, you can also know the time of hair loss and the type of hair loss, and the best way to solve the problem is to intervene in advance.

1 8 is the probability of giving birth to a "son" with curly hair and the genetic disease chronic nephritis, and this question asks about the probability of giving birth to a "child" with curly hair and the genetic disease chronic nephritis. First of all, we can deduce that the above female genotype is AAXB, and the male genotype is AAXBY, so we look at the hair shape gene located on the autosomal and the sex chromosome separately, and the autosomal genotype of the child obtained is aa:aa=1:

1, so the probability of giving birth to a child with curly hair is 1 2. In order for a child to have a genetic disease with the XB genotype involved in the sex chromosomes, this probability can be calculated from the law of gene segregation as 3 4. Therefore, the probability of developing a curly hair with hereditary chronic nephritis is 1 2 3 4 = 3 8