T.H Morgan (1908)
Genes are on chromosomes
Frederick Griffin (1928)
Transforming factor ; Harmless Live + Heat Killed Pathogenic still fatal in mouse
Avery; McCarthy; MacLeod (1952)
DNA is the transforming factor
Erwin Chargaff (1947)
Chargaff’s Rule (A=T , C=G)
Hershey and Chase (1952)
Confirmed DNA is genetic material ; Bacteriophage used, only phosphorus showed in DNA
Watson and Crick (1953)
Determined double helix structure of DNA
Meselson and Stahl (1958)
Semi-conservative replication; use of Heavy Nitrogen