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● Live R strain in the presence of heat­killed S strain produce virulence

                       because somehow R strain bacteria is transformed by heat­killed S
                       strain bacteria. Hence, it was concluded that there must be transfer of
                       genetic material.


               Biochemical Nature of Transforming Material
                   ● Avery, McLeod, and McCarthy worked to determine the biochemical

                       nature of genetic material responsible for transformation.




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                   ● This suggests that DNA has to be the genetic material.

               Hershey and Chase Experiment to Confirm DNA as the Genetic

               Material
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