Discovery of DNA- Ms. Borgie's Class

By aborgie
  • Frederick Griffith

    Frederick Griffith

    -Frederick Griffith worked with virulent S and nonvirulent R strain Pneumoccocus bacteria
    -He found that R strain could become virulent when it took in DNA from heat-killed S strain
    -Study suggested that DNA was probably the genetic material
  • Period: to

    Scientists Involved in DNA Discovery

  • Erwin Chargaff

    Erwin Chargaff

    Erwin Chargaff showed the amounts of the four bases on DNA ( A,T,C,G)
    In a body or somatic cell:
    A = 30.3%
    T = 30.3%
    G = 19.5%
    C = 19.9%
  • Rosalind Franklin

    Rosalind Franklin

    Rosalind Franklin took diffraction x-ray photographs of DNA crystals which showed the structure of DNA as a helix.
  • James Watson and Frances Crick

    James Watson and Frances Crick

    Watson & Crick built the first model of DNA using Franklin’s x-rays