Q.

Statement I: Complete disintegration of nuclear envelope marks the beginning of the second phase of mitosis.
Statement II: Metaphase chromosome is made up of two sister chromatids.

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a

Both S-I and S-II are incorrect

b

S-II is only correct

c

Both S-I and S-II are correct

d

S-I is only correct

answer is A.

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Detailed Solution

Complete disintegration of nuclear envelope marks the beginning of the second phase of mitosis which is metaphase. Metaphase chromosome is made up of two sister chromatids. Splitting of centromere takes place in the anaphase.

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