Untitled timeline

Main

Frederick Meischer

1869

Isolated and identified nucleic acid.

Fred Griffith

1928

Performed first major experiment which led to discovery of DNA.

Beadle and Tatum

1941

Created and analyzed mutants of Neurospora. Showed how genes direct the synthesis of enzymes that control metabolic processes.

Avery and McCleod

1944

Discovered that DNA is the substance that causes bacterial transformation.

Maurice Wilkins

1950

Contributed to scientific understanding of phosphorescence isotope, separation, optical microscopy, and x-ray diffraction.

Erwin Chargoff

1950

Helped us to know 1 rule of DNA. C = G, A = T.

Rosalind Franklin

1953

Took x-ray diffraction images of DNA.

Watson and Crick

1953

Figured out double helix shape of DNA.

Marshall Nirenburg

1961

Broke down genetic code.