DNA timeline

  • Gregor Mendel

    Gregor Mendel

    He made the fundemental laws of inheritance.
  • Fredrick Griffith

    Fredrick Griffith

    Did the first major experiment that led to DNA, discovered the S strain of DNA and the R strain
  • Oswald Avery

    Oswald Avery

    Identified the molecule that transformed the R strain into the S strain.
  • Erwin Chargraff

    Erwin Chargraff

    Analyzed the amount of adenine, guanine, thymine, and cytosine in DNA, he said cytosine was equal to guanie and thymine was equal to adenine.
  • Rosalind Franklin

    Rosalind Franklin

    X-ray diffraction of DNA
  • Hershey-Chase

    Hershey-Chase

    Published results of experiments that provided definitve evidence that DNA is a transforming factor.
  • James Watson

    James Watson

    Helped build the double helix model for DNA
  • Francis Crick

    Francis Crick

    Helped build the double helix model for DNA
  • Seymour Benzer

    Seymour Benzer

    Came up with Genetic of Phage.
  • Marshall Nirenberg

    Marshall Nirenberg

    He solved the genetic code.