character: James Watson
topic: Discovery of DNA double helix
grade: 9
subject: Biology
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character: Francis Crick
topic: Discovery of DNA double helix
grade: 9
subject: Biology
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character: Rosalind Franklin
topic: X-ray diffraction images of DNA
grade: 9
subject: Biology
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character: Maurice Wilkins
topic: DNA research and collaboration with Watson and Crick
grade: 9
subject: Biology
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