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Frederick Griffith
He did an experiment with mice. He used two types of pneumonia: Virulent and non- virulent. First he injected the virulent and the mouse died. Next he injected the non-virulent into another mouse and it stayed alive. Then he heated up the virulent to kill the disease and the mouse lived. Last he heated up the non- virulent and virulent together and the mouse died. He thought that when he adds the virulent and non-virulent together that it would turn virulent again so he called the passing of the -
Oswald Avery
He looked at Frederick Griffith's experiment. He was the one that found out that DNA causes the transformation of bacteria. He had help with Macleod and McCarty. -
Rosalind Franklin
Rosalind Franklin takes a picture of photo 51 which is an x ray showing the patteren of DNA. She found out that DNA had two forms A and B. -
Erwin Chargaff
He was the one who showed that the number of guanine equals the amount of cytosine, and the number of adenine equals the amount of thymine. He showed his findings to Watson and Crick and he was able to find out about the double helix. -
Watson and Crick
Maurice Willkins showed Watson and Crick Rosalind Franklin's photo of DNA without her knowledge. By using that photo, they found out that the structure of DNA is a double helix, and each strand contained nucleotides. -
Meselson & Stahl
They made an experiment about DNA replication. Using their experiment, they found out that DNA replication was semiconservative.
