Table of Contents
Which parent decides blood type?
Inheritance and the ABO Gene ABO blood type is inherited just like any other trait. Every person carries two genes, or alleles, for each trait. One ABO allele is inherited from the father (who passes on one of his two) and the other is inherited from the mother (who passes on one of her two).
Should your blood type match your parents?
Neither of your parents has to have the same blood type as you. For example if one of your parents was AB+ and the other was O+, they could only have A and B kids. In other words, most likely none of their kids would share either parent’s blood type.
Can O+ and B+ parents have a+ child?
Was this answer helpful? Mother of O and father of B can have child of O or B only , A+ not possible.

CAN A+ and O+ parents have a child?
Yes this is definitely possible. In this case, the most likely explanation is that dad is a carrier for being Rh- and mom is a carrier for blood type O. What happened was that dad and mom each passed both an O and an Rh negative to the baby. The end result is an O negative child.
Can AB father and O mother have O child?
To be O, you usually need to get an O from both mom and dad. But an AB parent usually has an A and a B version, not an O. So they usually can’t have an O child.

Does father and son have the same blood type?
While a child could have the same blood type as one of his/her parents, it doesn’t always happen that way. For example, parents with AB and O blood types can either have children with blood type A or blood type B. These two types are definitely different than parents’ blood types!
What blood group is best for marriage?
Based on these traits, the theory suggests these blood type matches are most likely to result in happy marriage:
- O Male × A Female.
- A Male × A Female.
- O Male × B Female.
- O Male × O Female.
Can siblings be different blood types?
No, siblings don’t necessarily have the same blood type. It depends on the genotype of both the parents for the gene determining the blood type. E.g. Parents with the genotype AO and BO can have offspring with blood type A, B, AB or O.