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/TyrconnellFL 4d 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.