1948 ⟶ Chargaff's rules about DNA base pairing
Erwin Chargaff showed that in DNA the number of guanine unit...
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1948
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1953
🧬 Oswald Avery proves DNA is genetic material
Oswald Avery proves that DNA is the genetic material of the chromosome⟶
GeneticsDNAMolecular BiologyAveryChromosomeHeredityScientific Breakthrough20th Century Science
USA🧪 Oswald Avery demonstrates DNA's role in carrying hereditary information
Oswald Avery shows that DNA carried the hereditary information in pneumococcus bacteria.⟶
GeneticsDNAMolecular BiologyAveryHeredityPneumococcusScientific Breakthrough20th Century Science
USA⚖️ Chargaff's rules about DNA base pairing
🧪 Hershey-Chase Experiment: DNA as Genetic Material
Alfred Hershey and Martha Chase showed that DNA is the genetic material in bacteriophage viruses.⟶
BiologyGeneticsMolecular BiologyDNAAlfred HersheyMartha ChaseBacteriophagesGenetic Material
United States🧬 Watson and Crick Publish DNA Double Helix Structure
After examining Franklin's unpublished data, James D. Watson and Francis Crick published a double-helix structure for DNA, with one sugar-phosphate backbone running in the opposite direction to the other. They further suggested a mechanism by which the molecule can replicate itself and serve to transmit genetic information. Their paper, combined with the Hershey-Chase experiment and Chargaff's data on nucleotides, finally persuaded biologists that DNA is the genetic material, not protein.⟶
Molecular BiologyDNAGeneticsWatsonCrickDouble HelixChargaffHershey-Chase ExperimentScientific Revolution1950s
United KingdomUnited States🧬 Watson and Crick Propose DNA Structure and Molecular Biology
James D. Watson and Francis Crick propose the structure of DNA, opening the door to the field of molecular biology.⟶
Molecular BiologyDNAWatsonCrickDouble HelixGeneticsScientific RevolutionCambridge1950sScientific Discovery
United Kingdom