Question

Assertion (A): ABO blood grouping is a good example of multiple alleles.

Reason (R): When I^A and I^B alleles are present together in blood group, they both express their own types.

Options

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

Explanation:

Both statements are true. ABO blood grouping is a multiple-allele system because it involves I^A, I^B and i; the reason describes co-dominance between I^A and I^B, not why the system has multiple alleles.