During cell growth,DNA synthesis takes place | vedclass

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(A) : In the $S$-phase (synthetic phase) of the cell cycle,chromosomes replicate. For this,their $DNA$ molecules function as templates and form carbon

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$S$-phase

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(A) : In the $S$-phase (synthetic phase) of the cell cycle,chromosomes replicate. For this,their $DNA$ molecules function as templates and form carbon copies. The $DNA$ content doubles,i.e.,from $1C$ to $2C$ for haploid cells and from $2C$ to $4C$ for diploid cells. As a result,duplicate sets of genes are formed. Along with the replication of $DNA$,new chromatin fibers are formed which remain attached in pairs,and the number of chromosomes does not increase. Since chromatin fibers are elongated chromosomes,each chromosome comes to have two chromatin threads or sister chromatids which remain attached at a common point called the centromere.

During cell growth,$DNA$ synthesis takes place on

Similar Questions

Why are chromosomes extended in the cytoplasm during metaphase?

Which phase begins with the condensation of chromosomes along their longitudinal axis?

The cause of chromosomal movement during anaphase is ........

Read the following statements:
$(a)$ Complete disintegration of the nuclear envelope marks the start of the second phase of mitosis.
$(b)$ Metaphase chromosome is made up of one sister chromatid.

Select the correct match.

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