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  4. How many chromosomes will the cell have at G1, after S, and after M-phase respectively, if it has 22 chromosomes at interphase?

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Q. How many chromosomes will the cell have at G1, after S, and after M-phase respectively, if it has 22 chromosomes at interphase?

NTA AbhyasNTA Abhyas 2020Cell Cycle and Cell Division

Solution:

If an interphase cell has 22 chromosomes than the cell at G1 has 22 chromosomes. In S phase on duplication of DNA occurs but chromosome number remains unchanged, thus cell at S phase will also have 22 chromosomes. After the M - phase or mitosis phase equal division occurs and two identical cells are produced having 22 chromosomes each.