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Question

Compare the statements A and B.
Statement A : Synthesis of DNA takes place in the S-phase of interphase.
Statement B : Every chromosome, during metaphase, has two chromatids in mitosis.
Select the correct description.

A
Both the statements A and B are correct and A is the reason for B.
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B
Both the statements A and B are correct and A is not the reason for B.
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C
Statement A is wrong and B is correct.
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D
Statement A is correct and B is wrong.
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Solution

The correct option is A Both the statements A and B are correct and A is the reason for B.
S-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. In metaphase, each pair of bivalents (two chromosomes, four chromatids total) align on the metaphase plate.
Thus, the correct answer is option A.

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