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    Biology GCSE

    Alleles and genetic variation

    What Alleles and genetic variation means in Biology GCSE, as defined for AQA.

    Definition of Alleles and genetic variation

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    The two members of a pair carry the same genes in the same order, though they may carry different versions called alleles, which is why characteristics can vary between siblings.
    AQA · Chromosomes (study guide)

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