Which diseases are inherited by pregnant women only to boys?

　　Among the many genetic diseases, some of them are sex-linked genetic diseases. The hereditary rule is: a mother who carries the disease-causing gene but does not develop the disease herself will only disease pass to boy , while the girl is healthy (but can carry the same disease-causing gene as the mother). Therefore, in order to have healthy children, it is recommended that the male in the woman’s family suffer from these diseases. sexually transmitted diseases When you are a human, it is not suitable to give birth to a boy. During the pregnancy period, it is not suitable to give birth to a boy. Hospital Using prenatal diagnosis, male fetuses are aborted while female fetuses are retained.

　　Such women often have in their families male (such as brother, uncle) patient, and female (Such as sisters, aunts) are all healthy.

　　hemophilia Passed only to boys

　　Hemophilia is a disease that is only passed on to boys. With this disease, the blood has difficulty clotting due to the lack of a coagulation substance. Therefore, bleeding will not stop with minor injuries, and subcutaneous and intra-articular bleeding will occur even without injury. If cerebral hemorrhage occurs, it will be fatal.

　　Experts explained that hemophilia does not mean that women will not get hemophilia, but that the proportion of men is relatively high. If the proportion of men in the normal population is 7%, then the proportion of women is 0.49%. Because this gene is an X-body recessive gene b, if a woman has the B gene on another X chromosome, then the b gene will not be expressed, but a man only has one X chromosome, so if he carries the b gene, it will definitely be expressed.

　　If the mother is a patient and the father is normal or not, then the son must be a patient.； If the mother is a patient and the father is normal, the probability that the son is a patient is 50% ； If the father is a patient and the mother is normal, then the daughter is a carrier ； If the father is a patient and the mother is a carrier, the daughter has a 50% chance of having the disease and a 50% chance of being a carrier. ； If the mother is normal and the father is a patient, the son is completely normal because the father gave the Y gene to the son, but the gene carrying hemophilia will not be given to the son. This is the basis of genetics.

　　Color blindness is also only passed on to boys

　　In addition, color blindness is also a genetic disease that is only passed from mother to boys. Others include pseudohypertrophic muscular dystrophy, renal diabetes, etc., which only occur in boys.

　　Therefore, in order to have a healthy child, it is recommended that when a male patient in the woman's family suffers from these diseases, it is not advisable to give birth to a boy. During pregnancy, the baby should go to the hospital for prenatal diagnosis, the male fetus should be aborted, and the female fetus should be retained.