History of the Discovery of DNA

By therriene
  • Period: to

    History of the Discovery of DNA

  • Griffith

    Griffith
    Expermint Took 2 strains on pneumonia, R-strain and S-strain
    Injected in 2 different mouses
    S-strain killed the mouse the other did not
    Heat killed S-strain did not kill the mouse
    Now Heat killed S-strain and R-strain killed the mouse Conclusion
    Something caused the R-strain to change

  • Avery, MacLeod, McCarty

    Avery, MacLeod, McCarty
    Took the heat killed S strain + the R strain then added a enzyme that would kill the protien.
    the mouse was injected and they found out that it still died
    then took a enzyme that killed DNA into the heat killed S strain
    and R strain DNA is the genetic Material

  • Chargaff

    Chargaff
    the number of A=T and C=G same amounts Discoverd 4 Nitrogen bases

  • Franklin and Wilkins

    Franklin and Wilkins
    they took pictures Discovered shape and structure of DNA
    DNA is a Double Helix

  • Hershey and Chase

    Hershey and Chase
    testing if DNA is the cause of the transformation Discoverd that DNA was the real cause of the transformation

  • Watson and Crick

    Watson and Crick
    Discoverd the true full shape of DNA Double helix