Being a boy or a girl also plays a role in genetics. Being able to freely choose whether to have a boy or a girl can avoid various diseases caused by sex-linked inheritance.
Sex-linked genetic diseases are diseases that are inherited along with gender. Sex-linked inheritance means that genes on sex chromosomes are inherited along with gender. Representative diseases caused by sex-linked inheritance, such as hemophilia, abnormal red and green vision (color blindness, night blindness), pseudohypertrophy, muscular dystrophy, etc. These diseases or conditions are passed on to children in a genetic way, but they appear differently in boys or girls. Therefore, the method of having boys and girls can be cleverly used to effectively avoid sex-linked genetic diseases.
Take hemophilia and abnormal color vision as examples. These recessive disease-causing genes are all on the X chromosome, but everyone knows that hemophilia does not occur in women.
Female sex chromosomes are made up of two X chromosomes. Therefore, even if one X chromosome has an abnormal gene, as long as the other X chromosome is normal, the abnormality will not show up. It can be seen that even if a woman has the potential gene for hemophilia, when she gives birth to a boy, the probability of the boy suffering from hemophilia is 50%. But if you give birth to a girl, you still have a 50% chance of getting the gene for hemophilia, but you only get it and you won’t suffer from hemophilia.
The male sex chromosomes are two sets of X chromosome and Y chromosome, so abnormalities of the X chromosome will be directly manifested. If the mother carries a sex-linked gene, it is best to give birth to a girl. On the other hand, if the wife is normal and the husband suffers from hemophilia, the boys born will be normal, so try to give birth to boys as much as possible. Of course, if the girl you give birth to is normal on the surface, she must be a potential hemophiliac.
The representative of abnormal color vision is abnormal red-green color vision, which is generally called color blindness. Abnormal red-green vision occurs in 4% to 5% of men. If the father has abnormal color vision, all boys born will have normal color vision and the gene will not be directly inherited. But if you give birth to a girl, the child will become a carrier of this gene even if she does not have abnormal color vision. So if this girl becomes a mother, the probability of giving birth to a boy with abnormal color vision reaches 50%.
The inheritance of sex-linked genetic diseases follows scientific rules. In order to avoid the birth of a sick child and bring misfortune to the family, couples suffering from sex-linked genetic diseases need to select the gender of the fetus after the wife becomes pregnant. , Only in this way can we give birth to healthy children.
This article is provided by Baidu Reading and is excerpted from \”Three Months Before Pregnancy – Pregnancy Preparation Period\” Author: Wang Liru