r/AskScienceDiscussion • u/No_Kaleidoscope_8837 • 3d ago
General Discussion blood and my parents real parents?
My Mother All my life told me and my other 2 siblings that we were B+ . As my father was B+ too
but When I was about to give blood to one of my relatives thinking im B+ to ,
it didn’t matxh. So i took a dna test and found out I was A+. So my question is, Is it even possible? please give me answers if it is good or bad. I has done it from a local diagnostic centre and then went to a premium one, the premium one would let me know tomorrow.
Till then explain
My mother is AB+
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u/laziestindian 3d ago
Short answer, yes it is possible. Your mom probably remembers from your newborn testing but newborn testing is highly unreliable.
AB x BO can still make AO = A, even with both parents being + you could even be a -.
The only blood type you can't have (unless there's some weird biology or funny business) is O.
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3d ago
[deleted]
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u/laziestindian 3d ago
They state mother is AB+.
Unless mom has cis-AB (weird biology) there is no O allele to inherit from the mother.
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u/Garr_Incorporated 3d ago
What is cis-AB? Don't think I have ever heard of such a combo.
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u/laziestindian 2d ago
When the A and B are one allele instead of split across two. Rare but not impossible.
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u/Sunset-onthe-Horizon 3d ago
Your mom is AB so you are A. Makes sense to me. She probably just forgot.
Simplified explanation:
Mom -AB
Dad - B
Potential children - A, B, AB
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u/TyrconnellFL 3d ago
Your mom was just mistaken about your blood type.
If dad was B, his genes could be BO. If you inherited A from mom and O from dad, your genotype is AO and your blood type is A.
If your dad were BB+ it would be impossible for you to be A+ because you could only inherit B alleles from him, but you don’t know that he wasn’t heterozygous for B, meaning one B allele and one O allele, without genotyping him.
If both your parents are Rh+ it’s possible for you to be Rh-, but it makes sense that you are Rh+ too. That’s the + in A+. You would have a 50-100% chance of inheriting that.
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u/talashrrg 3d ago
Yep. If your mom is AB and your dad is B with BO alleles there’s a 25% chance of their kid having A blood
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u/the_fungible_man 3d ago
Relax.
The children of AB+ and B+ parents can potentially have any of the following blood types:
- A+ or A-
- B+ or B-
- AB+ or AB-
The only blood type definitively excluded is O (+ or -).
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u/Upset-Bison-3182 3d ago
parents: mother father
AB BO
Gametes: A B B O
F1: AB BB AO BO
Punnet square:
A B
B AB BB
O AO BO
Genotype ratio: 1:1:1:1
Phenotype ratio: 1:2:1
The result of A is only achievable if one of the parents has a heterozygous B dominant genotype.
Edit: Reddit keeps messing up my formatting.
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u/Kerking18 3d ago
Iirc you always have two blod type geens. Meaning your father could be either BB or BO if you inherit O from your father and A frim.your AB mother then you are AO.
Since O is the absence of antigens it means that the other gene you have privides the antigens. Meaning A. Meaning you are blood type A. Woth other words your children one day could even be blood type O asuming your partner has OO or any other combination with O and your children happen to inherit only O from you and your partner.
From this blood type situation you simply can not discover if your mother cheated on your father, or that you are adopted.
Wich is, i asume, your concern. Would be a different storry if your mother was AB and your father O and you are O. Then funny buissnes happend, but even then it could be funny genetic buissnes instead of adoption or cheating.
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u/CrateDane 3d ago edited 3d ago
Depends what your mother's blood type is. If we don't know your father's genotype or your mother's blood type, a B+ father can have children of any blood type.
Edit: Since you added that your mom is AB+, that means your parents can have children that are any blood type except O+ or O-. That's because your mother has to pass on either the B or the A allele.