Discovery of DNA

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  • 1950s...
  • Scientist
  • We know that DNA is responsible for passing on genetic info, but how is it done?
  • We need to work out its structure so we can understand the process
  • Scientist
  • Rosalind Franklin
  • Our trial of producing x-ray photos of DNA was an amazing idea!
  • I know Rosalind! it showed that it has a regular structure which consists of a helix (spiral)
  • Maurice Wilkins
  • Crick
  • Watson
  • DNA BASES A,C,T,G
  • We propose that DNA has a sugar phosphate central helix with 4 bases
  • Opposition...
  • Are crick and Watson stupid! Their ideas about DNA would never work- the molecule would fall apart!!
  • Rosalind Franklin
  • Maurice Wilkins
  • look at this image that Franklin took! (photo 51)
  • 1953...
  • I know! DNA has a double helix structure with the bases in the centre like rungs on a ladder
  • Crick
  • Watson
  • 1962...
  • Nobel Prize evening
  • Maurice Wilkins
  • Crick
  • Watson
  • Yay! we've been awarded the nobel prize but sadly franklin died 4 years earlier so she can't be with us tonight.
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