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Biology Chapter 9 Summary

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Throughout Chapter 9, many different concepts related to genetic material are introduced such as many different experiments from scientists such as Griffith and Avery, the role of DNA, the structure of DNA, and the replication of DNA. In section 1, you are introduced to Frederick Griffith’s experiment testing for a vaccine against the S pneumoniae which resulted in his discovery of transformation. According the the textbook, the definition of transformation is: a change in phenotype caused when bacterial cells take up foreign genetic material. You are also introduced to Oswald Avery’s experiments that demonstrated that DNA is the material responsible for transformation. Lastly, in section 1 you are introduced to Alfred Hershey and Martha Chase’s

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