character: Francis Crick
topic: DNA Structure and Replication
grade: 12
subject: Biology
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character: Watson and Crick
topic: Discovery of the DNA Double Helix
grade: 12
subject: Biology
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character: Messelson-Stahl
topic: DNA Replication Models
grade: 12
subject: Biology
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character: James Watson
topic: Contribution to Genetics and Molecular Biology
grade: 12
subject: Biology
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