Assertion :Human ancestors never used their tails so that tail expression gene has disappeared in them. Reason: Lamarck's theory of evolution is popularly called theory of continuity if germplasm.

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 D Both Assertion and Reason are incorrect
If humans share ancestry with primates, then we should expect to see remnant of that common ancestry in our genes.
For example, tails, this characteristic is occasionally exhibited in atavism. According to current evolutionary theory, the ancestors of humans lost their tails about 25 million years ago, when apes ( tailless primates ) diverged from monkeys ( tailed primates ).
Secondly, Theory of continuity of the germplasm was given by Weismann. Therefore, both assertion and reason are incorrect.
Hence, Option D is correct.

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