Father has blood type O, mother has blood type AB, why do children have different blood types?

Doctor CKI Vo Thi Huynh Nga – Saigon South International General Hospital – reply:

Genetic blood group ABO or Rh is determined by DNA and of course children will be born with the blood type passed on by their parents.

However, a child’s blood type is not always the same as the parent’s because it is a dominant and recessive expression of the gene and the same goes for siblings.

In case the father has blood type O, the mother has blood type AB, the child can have blood type A or blood group B.

A child’s blood type is not always the same as the parent’s because it is an expression of dominant and recessive traits in the gene Shutterstock

According to the rules genetics According to Mendel’s theory, the combination of parents’ blood types can produce different blood types in the offspring’s lifetime. Therefore, if there are two children in the family, the children may have different blood types. However, there are also cases where children have the same blood type and the same blood type as their parents.

We can predict your blood group in the family based on the blood type of the parents, specifically according to the following principles:

From the analysis of blood group combinations as above, it can be seen that it is very normal for siblings to have the same blood type, and not the same blood group as their parents. At the same time, I also realized that concluding that two people have the same lineage or not blood group through blood group is not enough basis.