Question
If the father’s blood type is AB and the mother’s blood type is O, what blood type will the baby have?
Answer
According to blood type inheritance rules, when the parents’ blood types are AB and O, there is a 50% chance that the baby will have either A or B blood type. This is because blood type is controlled by dominant genes, while O blood type is a recessive gene. In this case, AB blood type cannot separate the recessive gene, so it can only separate a pure B gene combined with a recessive O gene. Since the O gene does not express itself, the baby’s blood type can only be A or B.