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Conducted an experiment that indeed showed that DNA is where genes and chromosones are made.
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Created the "Chargaff Rules" which stated that DNA from any living organism should have a 1:1 ratio of pyrimidine and purine bases, He discovered the double structure of DNA by doing that.
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Used bacteriophases to confirm that DNA was indeed the genetic material.
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Discovered the molecular structure of DNA through nuclear acids.
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Discovered the x-ray diffraction images of DNA which showed a clearer image of the double helix structure of DNA.
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He created the genetic code
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Created DNA sequencing.
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Discovered Homologous recombination
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Developed the gene chip, which displayed the detail of genetics
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Conducted the pea plant experiments and established the rules of heredity.