In an onion root cell, 16 chromosome present then how many chromosome will the cell have at G1 phase? Also ehat will be the DNA content of the cell at G1 phase and S phase and G2 phase if the content after M phase is 2C?

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Please find below the solution to the asked query    
          
At G1 phase, there will be 16 chromosomes as no DNA replication has taken place. After S Phase, the DNA content doubles but chromosome number still remains same here 14. After completion of M phase, the number of chromosomes will be 32 with each daughter cell having the same number of chromosomes as that of parent i.e 16.

G1 phase is the interval phase between mitosis and initiation of DNA replication. The initial amount of DNA is denoted as 2C ( C, is the haploid DNA content) which is then increases to 4C at the completion of S-phase. However there is no increase in the chromosome number; if the cell had a diploid or 2n number of chromosomes at G1, even after S-phase the number of chromosomes remains the same that is 2n. So if content after M-phase is 2C it will remain as 2C only.  
 

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