Biology / Unit 6 Bio 1193 short lesson, about 20 seconds
Griffith's Transformation Experiment (1928)
Captions available
The idea
Frederick Griffith showed in 1928 that a heat-killed pathogenic bacterial strain could transfer a heritable trait into a living harmless strain.
In practice
Mice injected with live harmless bacteria plus heat-killed pathogenic bacteria died, and live pathogenic bacteria were recovered from them.
Where people slip
Griffith identified a "transforming principle" existed — his experiment did not itself identify that principle as DNA.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
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