Question

What are the purposes of cellular reproduction via mitosis?

Explain the significance of the S, G1, and G2 stages of the cell cycle.

Answer 1

Mitosis is the division of a living cell into two daughter cells while preserving the chromosomal content after replication in the daughter cells. It occurs in the somatic cells of the body and is required for the growth of cells as well as for recovery. The two daughter cells are genetically identical to each other, thereby preserving the genetic individuality. All the organelles and components of the cell replicate and get divided into the two daughter cells.

G1 phase: It is the first gap phase and occurs during the interphase. In this phase, the cells prepares itself for mitosis by synthesizing necessary components like RNA, protein, etc. Also, the cell grows in size. Once a cell enters G1 phase, it commits itself to mitosis.

S phase: The S phase occurs between G1 and G2 phase. S stands for Synthesis. During this phase, the cell replicates its DNA and double the DNA content. However, the sister chromatids remain attached at their centromere.

G2 phase: The G2 phase is the second gap phase and occurs after S phase. During this phase, the cell rapidly grows and synthesizes proteins that would be necessary to enter into the prophase of mitosis.

_______________________________

[Kindly give a thumbs up]