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Griffith experiment 

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Frederick Griffith conducted an experiment with Streptococcus pneumoniae bacteria.

This was done to understand how characteristics are inherited.

In this experiment, he used two type of strains - smooth and rough. Smooth strains are virulent and rough strain are non virulent.

He injected a mice with a mixture of heat killed S strain and live R strain. This resulted in the death of the mice. From this, live S bacteria were recovered.

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