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Fred Griffith
He discovered what he called a "transforming principle" that caused inheritance. -
Fredrick Griffith
Frederick Griffith- discovered what he called the "transforming principle." However, he was killed in a bombing raid during World War II while he was working, so his discovery wasn't identified as DNA until after his death. -
Avery Maclyn McCarty and Colin MacLeod
they expected that the substance would be a form of protein, but it was DNA. This overturned the accepted understanding that DNA was relatively passing genetic trait and showed that genes are not made up of proteins but of DNA where chromosomes are made. -
Oswald Avery, Colin Macleod, and Maclyn McCarty
Oswald Avery, Colin Macleod, and Maclyn McCarty- discovered that genes and chromosomes were formed from the biomolecule DNA. -
Charoff
He came up with charoroff rules that states
the number of adenine (A) residues always equals the number of thymine (T) residues;- the number of guanine (G) residues always equals the number of cytosine (C) residues;
- the number of purines (A+G) always equals the number of pyrimidines (T+C)
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Crick and Watson
Based on Franklin's data, they both discoverd that DNA was a double-helix structure. -
Alfred Hershey and Martha Chase
Alfred Hershey and Martha Chase discovered a series of experiments in 1952 that showed DNA was made up of genetic material. Most scientists assumed that proteins were the components that carried genetic material. This helped the discovery of genetics. -
Rosliand Frankilin
Frankiln took photographs of DNA, "the most beautiful X-ray photographs of any substance ever taken." Between 1951 and 1953 Rosalind Franklin came very close to solving the DNA structure. -
Meselson and Stahl
Matthew Meselson and Franklin Stahl discovrered an experimeny in 1958 that supported the hypothesis that DNA replication was semiconservative. This has ben alled the Meselon-Stahl experiment.
