Adaryn
The Living Force
NinaMosi said:I hope this is not too off topic but, I have finally had a blood type test done and my results are that I am O-.
Yet, both my father and mother are AB+ as are all of my siblings save for the one who was from my mothers first marriage, later adopted by my father.
Is it an biological impossibility to have an 0- child from two AB+ parents?
Assuming there's been no error in the determination of your bloodtype (or that of your parents), according to the blood type chart (_http://www.redcrossblood.org/learn-about-blood/blood-types), it wouldn't be possible, no. But I don't know enough on this subject to say for sure.
You can check it out for yourself, using this calculator: _http://www.endmemo.com/medical/bloodtype.php