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    Hi, i want to know what the definition of homologous chromosome is that is worth 3 marks, and isn't too long

    Thanks

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    A homologous pair is a pair of chromosomes containing a maternal and paternal chromatid joined to together at the centromere. The have the exact same gene - although may have different alleles of these genes, Position (loci) and size. Members of a homologous pair pair up during meiosis.
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    (Original post by nelemauddin)
    A homologous pair is a pair of chromosomes containing a maternal and paternal chromatid joined to together at the centromere. The have the exact same gene - although may have different alleles of these genes, Position (loci) and size. Members of a homologous pair pair up during meiosis.
    quite lenghty for a 3marker, am sure u can break that up.
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    Mark scheme for what a homologous pair of chromosomes are:
    1 one maternal and one paternal / AW ;
    2 carry same genes ;
    3 carry, same / different, alleles ;
    4 (usually) same / similar, length ;
    5 centromere in same position ;
    6 same banding pattern ;
    7 pair up in meiosis / form bivalent ;

    Any 3 for 3 marks
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    Thanks for all your help!!

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Updated: January 2, 2013
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