Dna25

Important Scientists in the History of DNA

By kddrennon

  • Fredrick Meischer

    Fredrick Meischer
    First scientist to isolate DNA.

  • Oswald Avery

    Oswald Avery
    Discovered that DNA was responsible necessary for transformation to occur in bacteria.

  • Erwin Chargaff

    Erwin Chargaff
    Found that the amount of the nitrogen base Adenine was approximately equal to the amount of the base Thymine (and the amount of Cytosine equals the amount of Guanine) within a species, but that the amount of these bases vaired between species.

  • Rosalind Franklin

    Rosalind Franklin
    Rosalind Franklin uses x-ray diffraction to discover that DNA was a double helix structure with the nitrogen bases facing the inside of the structure and the sugar and phosphate along the backbone of the structure.

  • Alfred Hershey and Martha Chase

    Alfred Hershey and Martha Chase
    Used radioactively labeled bacteriophages (viruses made of protein and DNA) to proved that DNA was the genetic material of cells.

  • James Watson and Francis Crick

    James Watson and Francis Crick
    Made the first structural model of DNA. Proposed that the two strands of DNA were held together by hydrogen bonds and that the bases paired (Adenine with Thymine, Cytosine with Guanine).