Question

If my dad has the AB blood group, my mom has the O blood group. What blood group will I be? A, B or AB?

Answer 1

A or B

Explanation:

If someone with AB (alleles `i^A` and `i^B`) has children with someone with O blood type (alleles `i` and `i`), 50% of the children will be A, 50% of the children will be B.

As the person with the O blood type can only pass on the `i` gene, the children's blood type depends on the other parent.

If the other parent (the biological father) passes on the `i^A` gene, then the child will have A blood type (`i^A` and `i^B` are dominant over `i`). On the other hand, if the biological father passes on the `i^B` gene, the child will have B blood type.

Actually the offspring will carry O but will express A or B. You have to take the recessive in to account when determining the blood type of your offspring.