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Assertion :Th...

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Assertion :The egg of frog is moderately telolecithal. Reason: Sooner or later the cleavage pattern becomes irregular.

A

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

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B

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

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C

Assertion is correct but Reason is incorrect

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D

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
Telolecithal eggs have the moderate or large quantity of yolk, the distribution of yolk is not uniform. it is concentrated more towards the vegetal pole at the lower part and cytoplasm in the upper part.
Due to non-uniform distribution of yolk, the cleavage pattern becomes irregular in frogs.
So the correct option is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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