JIPMER2019BotanyCell Cycle and Cell Division
What will be the DNA content and number of chromosomes in a cell of after S-phase compared to the gamete of the same organism?
Options
- ASame DNA content but double chromosome number
- BFour times DNA content but double chromosome number
- CSame DNA content but half chromosome number
- DHalf DNA content but double chromosome number
Correct answer
B. Four times DNA content but double chromosome number
Step-by-step solution
The DNA content will be four times and the chromosomes will be double in number in a cell after S - phase as compared to the gamete of the same organism. Gametes are haploid(n) cells that contain one set of chromosomes and half amount of DNA content in it. During S- phase of cell division, only the DNA content of cell gets doubled from 2 n to 4 n while number of chromosome remain same in the dividing cell.