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NEET Sample Paper NEET Sample Test Paper-23

  • question_answer
    If a cell has 2n number of chromosome in \[{{G}_{1}}\]Gpphase, what is the number of chromosome in cell after S-phase?

    A)  n                   

    B)  4n

    C)  2n                              

    D)  8n

    Correct Answer: C

    Solution :

    S or synthesis phase marks the period during which DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C. However, there is no increase in the chromosome number; if the cell had diploid or 2n number of chromosomes at\[{{G}_{1}}\]even after S phase, the number of chromosomes remains the same, i.e., 2n.


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