3: Evidence DNA is Genetic Material (Experiments)
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Part 3
Last updated 5:00 AM on 3/30/26
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4 Terms
1
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Griffith:
Heat-killed S to live R —> mice die, yields live S Strain
Shows “Transforming principle”
2
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What did the Avery–MacLeod–McCarty experiment demonstrate?
DNase stops transformation —> DNA is hereditary material
3
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How did the Hershey–Chase experiment confirm DNA as the hereditary molecule?
It showed only viral DNA shown and no protein
Only DNA enters bacteria —> confirms DNA carries genetic instructions
4
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Explain why these experiments were necessary before scientists accepted DNA as the genetic material
They believed proteins carries genetic info instead of DNA
