In Griffith's experiments, DNA made the harmless R cells grow capsules when exposed to heat-killed S cells
What did the Griffith experiment show?
In his famous experiments, Griffith demonstrated in 1928 that the power to synthesis a capsule and hence become virulent can be transferred from heat-inactivated “smooth” strains to living but avirulent “rough” strains of S. pneumoniae.
How does Griffith'S experiment prove DNA as genetic material?
The III-S strain DNA contains the genes that form the graceful protective polysaccharide capsule. Equipped with this gene, the previous II-R strain bacteria were now protected from the host's immune system and could kill the host.) Griffith's experiment discovering the "transforming principle" in pneumococcus bacteria.
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