Blood group of the child

What type of blood does the child inherit from parents? This is not an idle interest, but rather important information. After all, the blood group is a kind of personality indicator. But, when it comes to the unborn child, we can only talk about probability and percentages.

How do I know the baby's blood type?

Mr. Landsteiner, a scientist who studied the structure of red blood cells, managed to establish that for each individual on the erythrocyte membrane there are so-called antigens: either an antigen of type A (group II of blood) or an antigen of type B (group III of blood). Then Landsteiner also found cells in which these antigens are absent (group I blood). Somewhat later his followers discovered red blood cells in which simultaneously A and B markers (IV blood group) were present. Based on the results of this study, the ABO system was founded and the basic laws of inheritance of the blood group, as well as other signs from parents to children, were formulated.

As a rule, it is possible to learn the blood group of a child with absolute accuracy only after the birth and the delivery of the corresponding analysis. But, since this inheritance process is subordinated to already known laws, even before the appearance of the baby, it is possible to make well-founded assumptions.

So, how to determine the baby's blood type ? The most likely combinations are:

1. Parents who do not have antigens, that is, mothers and fathers with group I blood, will definitely produce a baby with only blood group I.
2. In a married couple with I and II blood group, the chances of giving birth to a crumb with the I and II blood groups are exactly the same. A similar situation occurs between spouses with groups I and III.
3. As a rule, it is not easy to determine in advance the blood type of a child, one of whose parents is the carrier of both antigens. In this case, only the I blood group can be excluded.
4. However, the most unpredictable pair is still considered to be a husband and wife with blood groups III and II - their babies can inherit any combination.

So, we found out whose blood group is passed on to the child, or, more accurately, they understood the basic principles of these simple genetic combinations. Now let's talk about the Rhesus factor, which is inherited as a dominant trait. Uniquely Rhesus negative, the heir can only be in the family, where both parents are "negative." In "positive" spouses the probability of having a Rh-negative baby is 25%. In other cases, the result can be any.