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Watson and crick

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  • Griffith Bacteria Experment

    Griffith Bacteria Experment

  • Oswald Avery reforms Griffith's experiment

    Oswald Avery reforms Griffith's experiment

  • Chargaff's Rule is established

    Chargaff's Rule is established

  • Hershey and Chase confirm DNA is genetic material

    Hershey and Chase confirm DNA is genetic material

  • Rosalind Franklin uses x-rays to show double helix

    Rosalind Franklin uses x-rays to show double helix

  • DNA shape

    DNA shape

  • Watson and Crick mathematically show DNA helix

    Watson and Crick mathematically show DNA helix