Pls solve this question ??

Solution:

The correct option is (2).

The G1 phase of the cell cycle is also known as first growth phase, where the cell prepares itself for DNA replication and synthesis. This is followed by the S phase or the synthesis phase, where the DNA of the cell is replicated. After this comes the G2 phase where the cell prepares itself for mitosis. 

The chromosome number of the cell at the G1 phase and the G2 phase is same, only the amount of DNA is doubled. So, if the number of chromosomes is 20 at G1 phase, it will remain 20 at the end of the G2 phase. 
 

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