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Interphase

How many chro...

Question

How many chromatids are there in a chromosome after S phase?

A

One

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B

Two

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C

Three

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D

Four

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Solution

The correct option is B Two
During the S phase of the cell cycle, there is DNA replication (creating a copy of itself). The chromosome before DNA replication has one chromatin and after DNA replication has two chromatins. Both the chromatins are copies of each other.

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Standard XIII Biology

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