DNA

By DeeseJ

  • Frederick Griffith

    Frederick Griffith
    Griffith discovered that the previously avirulent R bacteria had acquired capsules. The bacteria isolated from the mice infected with the mixture of live R and heat-killed S were now all of the S strain, and maintained this phenotype over many generations. Griffith hypothesized that some "transforming principle" from the heat-killed S strain converted the R strain into the virulent S strain.

  • Colin Munro MacLeod

    Colin Munro MacLeod
    DNA is the active component responsible for bacterial transformation%u2014and in retrospect, the physical basis of the gene

  • Maurice Wilkins

    Maurice Wilkins
    Wilkins had evidence that DNA in cells as well as purified DNA had a helical structure.[

  • Alfred Hershey and Martha Chase

    Alfred Hershey and Martha Chase
    Alfred Hershey and Martha Chase did an experiment which is so significant, it is called the %u201CHershey-Chase Experiment%u201D.