Question

Which antibodies would be found in the serum of a person with AB blood?

1) anti-A antibodies
2) Both anti-B and anti-A antibodies
3) no antibodies to the AB antigens
4) anti-B antibodies

Answer 1

Individuals with AB blood type do not have any anti-A or anti-B antibodies, as their bodies recognize both A and B antigens as self.

Step-by-step explanation:

The antibodies found in the serum of a person with AB blood would be none regarding the ABO blood group antigens, because their immune system recognizes both the A and B antigens as self. Since individuals with type AB blood have both A and B antigens on their erythrocytes, they do not form the anti-A or anti-B antibodies. This is because the body is already acclimatized to these antigens as they are seen as part of the self and thus, it does not produce antibodies against them. Therefore, the correct answer to the question is that people with AB blood type have no antibodies to the AB antigens.