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He was very interested in pea plants because they were easy to distinguished, and grow fast. He noticed that the traits could be tracked from one generation to the next.
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He studied how the DNA can travel from one bacteria to another.
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He found that every neuclotide of DNA is similar in species, but even within species, none of them is equal.
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Martha Chase and Alfred Hershey worked on a labaratory with phages; those are viruses that attack bacteria.
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Discovered that DNA is the hereditary molecule of the cell, and that the molecule functions as a code. They are able to direct synthesis of proteins.
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Meselson and Stahl showed that new DNA is made by copying from the old. Each daughter cell must receive a faithul copy of the parent cell's DNA.
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Kornberg made a cell-free system that ruplicates DNA. He found that replication only occurs when all four nucleotides are present. Omit one, and polynucleotide chains are not synthesized.
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Sydney Brenner showed that rRNA was not the template for building proteins. There was a third type of RNA, an unstable intermediate that carries the DNA to the ribosme. After several experiments with bacteria his theory came up true, and he ccalled the new type: messenger RNA
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They looked at the development of the fruit fly, which goes through several distinct stages of development.
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Craig Venter found that genes only make up 3% of our genome, and he figured out a faster and cheaper method of finding them.
