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Your father has A positive blood and your mother has O negative and you recently found out that you are type B what is the likelihood of your dad actually being your dad?
Wiki User
∙ 15y ago
If your father has type A blood and your mother has type O blood, then the only possible blood types for their offspring are type A and type O.
If you have type B blood, then one of your parents must have had either type B or type AB blood. It is possible that one of your parents is mistaken about his or her blood type or that the blood test results were inaccurate. It is possible that you are adopted. It is possible that one of your parents is not your biological parent, although this does not mean an affair, since sperm donation is a possibility.
Because of a relative having an unusual blood type situation, I discussed it with a geneticist. A bone marrow transplant can occasionally change a person's blood type. Or, whoever did your blood test might have been slow (e.g., interrupted) or inexperienced in processing the sample (e.g., a high school science class), so you might have blood type O but appear to be blood type B. Or, your mother might have the Bombay phenotype that means she has a B, but appears to be an O. (This is what my relative probably had, which was why his blood type test results alternated.) It is also possible that one of your parents is a chimera, but I was told that this was the least likely possibility, so if you want more information on chimeras, check the Wikipedia link below.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoYES
In the ABO blood system A and B are co-dominant, O recessive. So your dad is O/O and your mum either B/B or B/O. So you could be B/O (blood group B) or O/O (blood group O)
In the Rhesus blood system, + is dominant over -. so your dad is -/-, and you mum either +/+ or +/-. You could be +/- (positive) or -/- (negative).
So yes, you can be B negative.The only things you can't be are AB or A blood groups.
Wiki User
∙ 14y agoYour father could be blood type A, B or O but not AB.
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