Is blood type hereditary?

In fact, everyone's blood type is related to their parents' blood type, which means it is hereditary. Our blood type is determined by genetic factors. Scientific research shows that different blood types have different genetic genes. A mother with type A blood will not give birth to a child with type B blood, and an AB mother will not give birth to a child with type A or type B blood. This article analyzes different blood types from the perspective of genetic genes. Let’s take a look.

What is blood type inheritance

Blood type is a classification based on the differences in homologous antigens on the surface of human red blood cells. Due to the different agglutinogens contained in human red blood cells, blood is divided into several types, hence the name blood type.

According to current clinical tests at home and abroad, there are more than 30 types of human blood types. Each human blood type system is determined by genetic factors and has immunological characteristics. The most common blood type system is the ABO blood type, which is divided into four types: A, B, AB, and O; the second is the Rh blood type system, which is mainly divided into Rh positive and Rh negative; the third is the MN and MNSs blood type system, but very few people have this blood type.

Human blood type is hereditary. When the blood type genes of both parents combine in the sex cells of both sexes, they can pair up in the chromosomes of the cell nucleus, thereby passing the blood type genetic characteristics to offspring.

Different blood types have different genetic genes:

The genetic gene for type A blood can be the combination of A and A of both sexes to form AA, or it can be the A gene of one sex combined with O of the other sex to form AO. But no matter whether it is AA or AO, the blood type that is displayed is type A, and O is a recessive genetic gene and cannot be expressed.

The genetic genes of type B blood are similar to those of type A blood. Some are BB and some are BO, but they all show type B.

The genetic genes of AB type and O type blood are consistent with the blood type they express, AB type is AB and O type is OO.

From this we can see that if the father and mother are type A or type B blood, their children may be type A or type B, but they may also be type O, because type A or type B both contain the recessive genetic gene O. When the O in the father's genetic gene combines with the O in the mother's genetic gene to form OO, it manifests as type O.