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    Nucleus................. No. of chromosomes..................... Mass of DNA

    Prophase of mitosis...................... 26 ......................... 60

    telophase of mitosis .................... 26 ........................... 30
    .
    sperm cell ........................ 13 ................................ ........ 30


    I just wanted to check if these value were right, they're from a past paper and i was only given the first line of infomation.

    Can someone check them please and if i'm wrong explain why please...

    thanks
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    (Original post by devan5)

    Can someone check them please and if i'm wrong explain why please...

    thanks
    The mass of DNA in the sperm cell is 15, no?
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    The mass of DNA in sperm cell should be half of that in telophase of mitosis because there are 2 divisions in meiosis.
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    "telophase of mitosis .................... 26 ........................... 30"

    Wouldnt the chromosme number half due to the separation of chromatids? so from 26 --> 13??

    Oh and sperm cell should be half of that in telophase so 6.5 ?? :O
    Mass of Sperm cell would be 15! (Half of that in telophase)
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    i've seen this question and to be honest it makes no sense whatsoever. by prophase the chromosomes have already replicated, meaning in a standard cell you'd only have 13 chromosomes, since sperm are gametes it should be half as much again, so 6.5, which is ridiculous as you wouldnt get .5 of a chromosome. bit of a slip up by the exam board i think
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    (Original post by Artymess)
    i've seen this question and to be honest it makes no sense whatsoever. by prophase the chromosomes have already replicated, meaning in a standard cell you'd only have 13 chromosomes, since sperm are gametes it should be half as much again, so 6.5, which is ridiculous as you wouldnt get .5 of a chromosome. bit of a slip up by the exam board i think
    Why would a standard cells have 13 chromosomes?

    Are you high?

    Edit, just noticed what you mean. I think they mean 26 pairs in prophase, then 26 in telophase, but after meiosis, the chromatids become the chromosomes so there are 13 chromatids > so 13 chromosomes.
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    I'm not high at all, the question doesn't state that it's a human cell, so it doesnt have to have 46 chromosomes. but i think you're right, its just a case of the exam board not thinking through the question
 
 
 
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