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A 32-year-old member asked:

What happens if two parent with o positive blood types have a child with b negative blood type?

1 doctor answer4 doctors weighed in
Dr. Holly Maes
Pediatrics 36 years experience
Not possible: It is possible for the child to be rH negative if both parents are hybrid rH positive (one positive and one negative rH gene), but if they are both type O can only have type O children. Either one of them is not the biologic parent, or someone's blood typing is a mistake. Someone had to give that B gene.

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Last updated Jan 29, 2018
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