Assertion: Blood group 'O' have anti-A & antiB antibodies.
Reason: It does not have any antigens.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false.

Solution

If both assertion and reason are true but reason is not the correct explanation of assertion

ABO blood groups are determined by the gene I (iso agglutinin). There are three alleles, I^A, I^B and I^O of this gene. Proteins produced by the I^A and I^B alleles are called A antigen and B antigen. People with blood group A have the A antigen on the surface of their RBCs, and antibodies against antigen Bin their plasma. Persons with blood group B have B antigen on their RBCs, and antibodies against A antigen in their plasma. Individuals with AB blood group have both antigen A and antigen B on their RBCs, and no antibodies for either of the antigens in their plasma. Type O individuals are without A and B antigens on their RBCs, but have antibodies for both these antigens in their plasma.

Some More Questions From Reproduction in Organisms Chapter

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Reproduction In Organisms

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