Assertion :ABO blood group system provides a good example of multiple alleles. Reason: In ABO blood group system, when /A and JB alleles are present together, they both express their own types.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
ABO blood group system is an example of multiple alleles and this assertion is true. Also, the presence of A and B alleles give rise to the AB blood group and is co-dominant and the reason stated is also true. However, the reason that ABO blood group is multiple allele systems is that Blood type exists as four possible phenotypes: A, B, AB, & O. There are 3 alleles for the gene that determines blood type.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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