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The Structure of DNA

The Structure of DNA. Erwin Chargaff. 1950’s time period Chargaff’s rule- The amount of A is always equal to T. The amount of C is always equal to G. Only A fits with T and only C fits with G. Rosalind Franklin & Maurice Wilkins. - Rosalind Franklin took the first

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The Structure of DNA

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  1. The Structure of DNA

  2. Erwin Chargaff • 1950’s time period • Chargaff’s rule- The amount of A is always equal to T. The amount of C is always equal to G. Only A fits with T and only C fits with G.

  3. Rosalind Franklin & Maurice Wilkins - Rosalind Franklin took the first x-ray image of DNA. Maurice Wilkins sent this photo to his Watson & Crick

  4. James Watson & Francis Crick • In 1953 Watson and Crick created a model of DNA using work from others (Rosalind & Wilkins). • They modeled DNA as a double helix or twisted ladder.

  5. Mutations • Mutations are changes in DNA. • Mutagens are things that cause mistakes or mutations. (Smoking, Radiation, Sunlight)

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