My parents are both blood type O+ and I'm curious if it is possible for their son to be blood type B-. My other brother and I are blood type O+ and I have the understanding that O+ parents...

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motherlove28

My parents are both blood type O+ and I'm curious if it is possible for their son to be blood type B-. My other brother and I are blood type O+ and I have the understanding that O+ parents only have O+ offspring. Is this true?
Thank you for your answer.

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