An anaphase chromosome contains

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(A) During the $S$-phase of the cell cycle,$DNA$ replication occurs,resulting in each chromosome consisting of two sister chromatids joined at the cen

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$1$ $DNA$ molecule

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(A) During the $S$-phase of the cell cycle,$DNA$ replication occurs,resulting in each chromosome consisting of two sister chromatids joined at the centromere. Each chromatid contains one $DNA$ molecule. During anaphase,the centromere splits,and the sister chromatids separate. Each separated chromatid is now considered an independent chromosome. Therefore,an anaphase chromosome (which is a single chromatid) contains exactly $1$ $DNA$ molecule.

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