The Discovery of DNA Nick, Andrew

  • Barbara McClintock
    1440

    Barbara McClintock

    In the late 1440's, she discovered that some genes could be mobile, or the concept of chromosome breakage, which led to the discovery of laws that change position in a chromosome.
  • Friedrich Miescher

    Friedrich Miescher

    Friedrich Miescher was responsible for the discovery of Nucleic Acid. In 1869, he was able to isolate nuclein and also was able to identify DNA as a distinct molecule.
  • Frederick Griffith

    Frederick Griffith

    He was a British bacteriologist that had a famous experiment in 1928. This showed that bacteria can distinctly change their function and form through transformation.
  • Oswald Avery, Maclyn McCarty & Colin McCleod

    Oswald Avery, Maclyn McCarty & Colin McCleod

    These people were responsible for finding out that DNA is a substance that causes bacterial transformation.
  • Erwin Chargaff

    Erwin Chargaff

    He became interested in DNA after identifying the molecule as the basis of heredity. In 1950, he discovered that the amounts of adenine and thymine were equal and the amounts of cytosine and guanine were the same. These were known as the first of Chargaff's Rules.
  • Rosalind Franklin & Maurice Wilkins

    Rosalind Franklin & Maurice Wilkins

    They both used X-ray diffraction to find images of DNA. It was called photo 51 and was used by Watson and Crick to eventually find that DNA is made of a double helix.
  • Alfred Hershey & Martha Chase

    Alfred Hershey & Martha Chase

    They did one of the most famous experiments in molecular biology. The "Bender", proved that DNA carried genetic information.
  • James Watson & Frances Crick

    James Watson & Frances Crick

    James Watson and Francis Crick discovered the structure of DNA or the double helix. Also, they found out about the nitrogen bases, adenine, guanine, cytosine, thymine.
  • Matthew Meselson & Franklin Stahl

    Matthew Meselson & Franklin Stahl

    Matthew Meselson and Franklin Stahl discovered how to replicate DNA.
  • Linus Pauling

    Linus Pauling

    In the 1950's, he became known as the founder of molecular biology due to his discovery of the spiral structure of proteins. This contributed to Watson and Crick's breakthrough with the double helix.
  • Frederick Sanger

    Frederick Sanger

    He discovered the base sequences for nucleic acids.
  • Paul Berg

    Paul Berg

    He worked along side Frederick Sanger to identify the base sequences for nucleic acids.
  • Kary Mullis

    Kary Mullis

    He discovered the polymerase chain reaction, or the process of replicating specific fragments of DNA.
  • J. Craig Venter

    J. Craig Venter

    In the early 2000's, he discovered the first human genome using a synthetic chromosome