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Counting chromatin

Discussion in 'DAT Discussions' started by SundevilDMD, Jul 20, 2006.

  1. SundevilDMD

    SundevilDMD Sundevil
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    hey guys i forgot how to tell how many chromatin are in a cell..fr example if an organism is 2n=20..how many chromatin in the different divisional phases?

    thanks
     
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  3. ryan85

    ryan85 Member
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    i'm pretty sure it goes that if a diploid cell has 20 chromosomes, then after DNA replication, there will be 40, and after mitosis there will be 2 daughter cells with 20 each. in meiosis, there will be 4 gamets with the haploid number of 10 each.
     
  4. whiskeysour

    whiskeysour up'n the competition
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    correct... and the result of meiosis 1 is 2 daughter cells that are genetically different with a diploid number of 2N, and the results of meiosis 2 is 4 gametes that are genetically different with a diploid number of N.

    in a nutshell:
    meiosis 1 = crossing over, recombination, genetically different 2N daughter cells
    meiosis 2 = same as mitosis except no dna replication, results in 4 haploid gametes.

    WS
     

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