When it comes to “passing on male to female”, it is easy to think of the familiar plot of TV drama, what kind of ancestral treasure and martial arts secret. In order to ensure the purity of family blood, many of them are passed on from male to female. However, if you think that the transmission of men and not women are babies, it is wrong, because some genetic diseases are only transmitted to men and not to women.
As some genetic diseases are transmitted from male to female, it is suggested that couples with the following genetic diseases should not bear boys for the sake of the health of the offspring and for the sake of eugenics and good breeding.
Four genetic diseases were transmitted from male to female
1. Red green color blindness
Color blindness is a kind of congenital and hereditary disease. People with color blindness will have many problems in their daily life, such as many jobs that are not suitable for doing, such as joining the army, pilots, drivers, painting, etc.; sometimes it may endanger life, such as driving in traffic lights, red and green color blindness is dangerous.
You may find that most color blindness is male. To say that color blindness is a genetic disease of “passing male to female” does not mean that all color blindness is male, but the probability of male color blindness will be greater. Let’s look at the inheritance of color blindness
1. If the father is color blind and the mother is normal, then the boys born to them are normal, and the girls are all gene carriers.
2. If the father is normal and the mother is a gene carrier, half of the boys born are color blind and half of the girls are gene carriers. If there is only one male and one female, they may be normal, or they may be color blind and the female carriers.
3. If the father is normal and the mother is color blind, all the boys born are color blind and the girls are gene carriers.
4. If the father is color blind and the mother is a gene carrier, half of the boys born are color blind and half of the girls are gene carriers.
5. If the father and mother are color blind, all the children born are color blind.
From the above five genetic laws, girls may be color blind only when their parents are color blind, or their father is color blind and their mother is a gene carrier. Boys are more likely to become color blind, unless their parents are not color blind or even gene carriers, boys can not be color blind.
So, if either of you has color blindness, or carries a genetic code for color blindness, you’d better not have a boy!
Navigation in this article
Page 1: red green color blindness page 2: Hemophilia
Page 3: broad bean disease
Page 1: red green color blindness
Page 2: Hemophilia
Page 3: broad bean disease
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