Section 1

Discovery of DNA

• Griffith's experiments showed that hereditary material can pass from one bacterial cell to another. This is called transformation.

Vocabulary virulent (p. 193)

transformation (p. 194)

• Avery's work showed that DNA is the hereditary material that transfers information between bacterial cells.

• Hershey and Chase confirmed that DNA, and not protein, is the hereditary material.

bacteriophage (p. 195)

transformation (p. 194)

bacteriophage (p. 195)

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