DNA Timeline

  • Miescher

    discovered nucleic acids
  • Griffith

    discovery of pneumococcal transformation
  • Avery

    discovered that DNA transmits heredity
  • Chargaff

    discovered that guanine is equal to cytosine and thymine is equal to adenine
  • Franklin and Wilkins

    Discovered X-ray diffraction
  • Hershey and chase

    discovered that DNA is the genetic material not protein
  • Watson and Crick

    Discovered that DNA structure is the double helix