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

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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

Vedclass · Accepted Answer

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

Vedclass · Answer

(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?

Similar Questions

Which phase is the initial phase of interphase?

The phase between the two successive $M$ phases is called as

Given below are the two statements.
Statement $I$: Replication of $DNA$ occurs in the '$S$' phase of interphase in the cell cycle.
Statement $II$: Replication of $DNA$ takes place only once in the cell cycle.
In the light of above statements,choose the correct answer from the options given below:

The initial phase of interphase is:

If an egg of an organism has $10 \; pg$ of $DNA$ in its nucleus,how much $DNA$ would a diploid cell of the same organism have in the $G_2$ phase of the cell cycle (in $; pg$)?

Vedclass Test Series

Exam Paper Generator

Online Exam Module