What is the genetic probability of baldness?

In real life, baldness is a relatively common condition, and baldness will not only easily affect personal image, but also health. Baldness is also prone to hereditary conditions, and will be passed on to the next generation through the human genes and chromosomes. In particular, the probability of passing it on from father to son is relatively high, and the probability of passing it on to daughters is not very high, but there are also some genetic factors.

What is the genetic probability of baldness?

Not all baldness is hereditary. There is a certain chance that baldness will be hereditary, and the inheritance is different between men and women. It is a dominant trait in boys, but a recessive trait in girls.

In summary, a small number of baldness is passed down from the father to the son. If the father is bald and the grandfather is also bald, the incidence of a boy is about 100%; if the father is not bald and the grandfather is slightly bald, there is a 25% chance of a boy; if the father is not bald and the grandfather has a full head of thick hair, the possibility of a bald baby is almost zero.

Through the research on whether male baldness is hereditary, it was found that baldness is a sex-linked recessive genetic disease, and generally baldness is inherited from one generation to another. For example, the grandfather is bald, and so is the grandson. This is because the X chromosome of the grandfather's baldness was given to the mother. And the mother is a normal carrier because only one of the two X chromosomes of the mother carries the baldness gene, and the other is normal, and baldness is a recessive gene. If the mother gives birth to a son, there is a 50% chance that the son will get a chromosome with the baldness gene. If the son unfortunately inherits the X chromosome with the baldness gene from the mother, then he will be bald. Because men only have one X chromosome.

The dangers of baldness

1. Greater stress. Men and women who are under stress produce large amounts of adrenaline, cortisol, and testosterone. These hormones cause hair follicles to enter a "dormant" state, and when hair falls out, the follicles remain inactive for three months.

2. Thyroid dysfunction. A slender forehead and thinning hair may mean that the thyroid gland is not functioning properly. The hormones released by the thyroid gland in the neck regulate many important functions of the human body, including hair growth.

3. Immune system disorders. Baldness may also be caused by lupus erythematosus, an autoimmune disease that can cause systemic inflammation.

4. High risk of heart disease. Men with sciatica have a higher risk of heart disease.

5. Prostate enlargement. A study conducted by Spanish scholars on 30 men found that the prostate of men with thick hair was 34% larger than that of men with thick hair.