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Frederick Griffith
Griffith's experiment showed that bacteria can transfer genetic material through transformation. Griffith's experiment is as depicted. -
Avery-MacLeod-McCarty
(exact month not known) They discovered that DNA causes bacterial transformation, during a time when it was beilieved that proteins contained genetic material. -
Erwin Chargaff
(exact month isn't known) Responsible for Chargaff's 2 rules. The first was that the number of cytosine was equal to the amount of guanine, and the number of adenine was equal to the amount of thymine (hinting at the pairing). The second rule was that the amount of As, Ts, Cs, and Gs change from species to species (suggesting that DNA was genetic material and protein was not). -
Rosalind Frankin
Discovered the double helix shape of a DNA strand, shown in the infamous photo 51. Notes dictate that she discovered it during november 1951, the exact date isn't known. -
Watson and Crick
Watson and Crick describe the shape of DNA as a twisted ladder shape of deoxyribose nucleic acid. -
Meselson and Stahl
(exact month isn't known) The Meselson-Stahl experiment suggested that DNA replication was semi-conservative, which meant that 1 strand of the double helix was from the original helix and the other strand was synthesized.
