# 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?

Jun 29, 2015

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.