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Interactive
Cold Spring Harbor Laboratory

Dolan Dna Learning Center: Dna Molecule: Basepairing

For Students 9th - 10th
See how the discovery of DNA in 1953 sparked a new era of research into the code of life. [1:40]
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Interactive
Cold Spring Harbor Laboratory

Dolan Dna Learning Center: Dna Molecule: Chargaff's Ratios

For Students 9th - 10th
Learn about base pairing in DNA, and how the ratios of adenine to thymine and guanine to cytosine are equal. [0:47]