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    Do chromatids twisted together or not - a or b?
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    It should be (a). Why do you think it could be (b)?
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    Why do chromosomes stick together?
    because they're bromosomes
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    (Original post by katieMCR)
    Why do chromosomes stick together?
    because they're bromosomes
    I rate you
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    (Original post by katieMCR)
    Why do chromosomes stick together?
    because they're bromosomes
    The door please
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    (Original post by Ordo)
    Do chromatids twisted together or not - a or b?
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    its B
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    (Original post by Sciatic)
    It should be (a). Why do you think it could be (b)?
    It's B- because each chromatid is from each parent- it wouldn't make sense for both the maternal and paternal chromatid to have a mix
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    B. Theyre just two seperate strands of DNA which are joined together by the thing in the middle (the centromere)

    Btw good one Sciatic
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    (Original post by Nayzar)
    B. Theyre just two seperate strands of DNA which are joined together by the thing in the middle (the centromere)

    Btw good one Sciatic
    Nope, I've always visualised them as (a). Perhaps they are the same thing in two different angles; (a) being seen from above and (b) being seen from laterally.

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    (Original post by MMMSS)
    It's B- because each chromatid is from each parent- it wouldn't make sense for both the maternal and paternal chromatid to have a mix
    (Original post by Nayzar)
    B. Theyre just two seperate strands of DNA which are joined together by the thing in the middle (the centromere)
    Thanks guys i understand it now
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    (Original post by Sciatic)
    Nope, I've always visualised them as (a). Perhaps they are the same thing in two different angles; (a) being seen from above and (b) being seen from laterally.

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    Well true fair enough i guess u could be a but B is the general representation bc its more accurate
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    (Original post by Ordo)
    Do chromatids twisted together or not - a or b?
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    Since sister chromatids are identical copies of the original 'chromosome' then both a and b are correct, and it doesn't actually matter.

    In reality, b is 'more correct' for A-level since the copies are attached by the centromere but remain separate.

    However, sister chromatids are not drawn in different colours as they are identical.

    Non-sister chromatids on homologous chromosomes are drawn in different colours as they are non-identical due to allelic variation.
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    (Original post by Why-_-Study-_-)
    The door please
    i know, it was terrible. but thats why it had to be put.... okay..... feel free to slam the door violently behind me will you?
 
 
 
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