Assertion :A genetic probe is helpful in the detection of specific DNA sequence. Reason: The genetic probe is a radiolabelled cDNA, which has a complementary base sequence, to DNA fragment which is to be detected.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The nucleic acid sequences which are used to precisely locate the complementary DNA sequence through hybridization are known as a genetic probe. To identify the presence of probe by autoradiography, they are radioactively labelled. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion. So, the correct answer is option A.

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