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Levene discovered the basic structure of nucleotides that make up DNA during the 1920s.
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Griffith figured out that there was some kind of genetic material that caused cells to change.
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In 1944, Oswald Avery and two other biologists deduced by an experiment that DNA caused change in bacteria transformation.
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Discovered sickle cell anemia as a molecular disease.
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Chargaff published that the amount guanine nearly equals the amount of cytosine, and the amount of adenine nearly equals the amount of thymine, 1950.
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In 1928, through testing bacteriophage, they discovered DNA was what transformed materials.
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Rosalind Franklin took an X-ray photo of DNA and it helped other scientists figure out the structure of it, taken in 1952
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Wilkins worked at King's College in London with Rosalind Franklin using X-ray diffraction to see the DNA molecules.
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Measured Rosalind Franklin's DNA photograph and made a model, including two outside strands of deoxyribose and phosphate that alternate, cytosine and guanine bases paired to 3 hydrogen bonds, and thymine and adenine base paired to two hydrogen bonds.
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The textbook.
