What will be the DNA content of a cell at G1, after S and G2., if the content after the M phase is 2C.
Before mitotic division, the cell is in the interphase. There are three phases in interphases G1, S, G2. The daughter cell grows in size and produces the enzyme required for replication in the G1 phase. In the S phase, DNA replicates and the content of the chromosome gets double. In the G2 phase, cells grow in size and prepare to move in mitosis. Hence, when DNA content after the M-phase of a cell is 2c then in the G1 phase it remains in 2c as no replication occurs in this phase. In the S phase, DNA content becomes 4c as DNA replication takes place in this stage, and in the G2 phase, the DNA content will remain 4c. Then, when this cell finishes mitosis, the DNA content gets reduced to half i.e, 2c. G1-2C1S-4C, G2-4C
