What change occurs in the nucleus of a cell a | vedclass

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(C) In the cell cycle,the $G_1$ phase represents the initial growth phase where the $DNA$ content is $2C$ and the chromosome number is $2n$. During th

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$2C \rightarrow 4C, 2n \rightarrow 2n$

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(C) In the cell cycle,the $G_1$ phase represents the initial growth phase where the $DNA$ content is $2C$ and the chromosome number is $2n$. During the $S$ phase (Synthesis phase),$DNA$ replication occurs,which doubles the $DNA$ content from $2C$ to $4C$,while the chromosome number remains $2n$ because the sister chromatids remain attached at the centromere. Following the $S$ phase,the cell enters the $G_2$ phase. Therefore,in the $G_2$ phase,the $DNA$ content is $4C$ and the chromosome number remains $2n$. Thus,the transition from $G_1$ to $G_2$ involves a change in $DNA$ content from $2C$ to $4C$,while the ploidy $(2n)$ remains constant.

What change occurs in the nucleus of a cell as it progresses from the $G_1$ phase to the $G_2$ phase?

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