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Miescher
Miescher discovered the molecule nuclein. This was done by extracting from the nucleus of salmon sperm. this discovery is very important because it holds the cells DNA. -
Chargaff
Chargaff was extremely interested the bases of DNA. He examined them exclusively. While was doing this he noticed that the levels of bases were linked. if the levels of adenine and thymine where increased then guanine and cytosine decreased and vice versa. This became as Chargaff's rule. Its still used today and helps us understand how basis are linked. -
Franklin
Franklin is the secret lady behind finding the double helix structure of DNA. She as an assistant that was in charge of dna x rays. She discovered the double helix when she noticed that even though the dry copy was sharper. The wet copy showed a double . This supported the double helix we still know today. -
Hershey and Chase
Hershey and Chase discovered that viruses inject their genetic material into a cell. This is supported by the coat of a virus and the inside of a virus labeled. the virus with its inside labeled with sulfur with sulfur in the cell while the virus coated did not. -
Watson and Crick
Watson and Crick were the last step in finding the structure of DNA; Some say that they took info from Franklin. They were very focused on how DNA were structured. they had cardboard models and supposedly noticed a relation between adenine and thymine. there was also a relationship between guanine and cytosine. This lead to the knowledge of the structure of DNA. -
Meselson and Stahl
Meselson and Stahl discovered that DNA replicates itself. They did this by growing E.coil containing a isotope of nitrogen. Then was spinned at high speeds. One was greater in density than the other thus supporting DNA replicates itself.
