the percentage of the 4 types of nucleotides is different in different organisms; percent of adenine nucleotides is the same as the percent of thymine nucleotides; percent of cytosine nucleotides is the same as percent of guanine nucleotides
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Maurice Wilkins
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operated a lab where X-ray crystallography was conducted to analyze molecules
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Hershey and Chase
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used bacteriophages to isolate that the DNA from the phage transforms the bacterial host
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Rosalind Franklin
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took the first X-ray picture of DNA
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Frederick Griffith
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transformation of genetic material is possible through use of two pneumonia strains
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Linus Pauling
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DNA strand model; triple helix idea was later disproven
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Oswald Avery
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repeated Griffith's experiments to find that the transforming agent was DNA
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Meselson and Stahl
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used isotopes of nitrogen to demonstrate that DNA replication could not be conservative or dispersive; evidence that DNA replication is semi-conservative
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Watson and Crick
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proposed the double-helix model of DNA based on contributions of earlier scientist; proposed semi-conservative model of replication, but lacked supportive evidence