Red blood cells have no nucleus so all are the same?
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I know there are different types of blood like A and B, but if I was A type and took someone elses A type blood would you be unable to see any difference because there's no DNA? Is this why we can do blood transfusions without rejection?
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Answer:
DNA has nothing to do with the actual reactions in blood typing. That has to do with the sugar chains on the red cell surface. If the two type A bloods were compatible, yes, you would see no difference. But there are other blood groups beside the ABO system and that can cause incompatibility, which is why blood is crossmatched.
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Other answers
Though they have no nuclei red calls do have a number of antigenic features. The most prominent ones are the ABO groupings, but there are other more minor ones that can induce a reaction.
Dr Frank
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