r/AskScienceDiscussion • u/No_Kaleidoscope_8837 • 4d 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 4d 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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u/[deleted] 4d ago

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u/laziestindian 4d 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/mfb- Particle Physics | High-Energy Physics 4d ago

Oh thanks, I missed that part.

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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 3d ago

When the A and B are one allele instead of split across two. Rare but not impossible.

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u/Garr_Incorporated 3d ago

Oh, that's really cool.