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Number of chromosomes in each step of mitosis in human

  1. Jan 27, 2009 #1
    1. The problem statement, all variables and given/known data
    I basically need to find out the chromosome number present during each step of human somatic cell division

    2. Relevant equations
    N/A

    3. The attempt at a solution
    Here's what I came up with:
    interphase g1 - 23
    interphase s - 46
    interphase g2 - 23
    prophase - 23
    prometaphase - 23
    metaphase - 23
    anaphase - 46
    telophase - 46
    cytokinesis - 23

    Can anyone confirm or reject my attempt? Thanks.
     
  2. jcsd
  3. Apr 28, 2009 #2
    I was wondering this, too... but I think at one point there are 92... currently trying to google it.
     
  4. May 1, 2009 #3
    for interphase g1 you meant 23 chromosomes?

    it should be 23 pairs of chromosomes! making you 46 chromosomes in all.

    23 chromosomes from mum and 23 chromosomes from dad.

    then you should correct all the numbers accordingly.

    and why would the number of chromosomes be halved from interphase s to interphase g2?

    kushal
     
  5. May 1, 2009 #4
    Mitosis is the name you use when reproductive cells divide. In each reproductive cell there is half the amount of chromosomes (half in sperm cells and the other half in egg cells), when these two go together it makes a single cell with 46 chromosomes.

    Every cell in the human body, except reproductive cells, contain 46 chromosomes, therefore, 23 chromosomes are in each cell that undergoes mitosis.
     
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