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Hershey's work on T2 phage. DNA, not protein is hereditary substance. CONTENT. 1.Hershey History. 2. What is T2??. 3. Infective Cycle. 4. Hershey Chase Experiment. 5. Conclusion. Alfred Day Hershey. His best known experiment is Hershey Chase experiment

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slide1
Hershey's work on T2 phage

DNA, not protein is hereditary substance

slide2
CONTENT

1.Hershey History

2. What is T2??

3. Infective Cycle

4. Hershey Chase Experiment

5. Conclusion

alfred day hershey
Alfred Day Hershey
  • His best known experiment is Hershey Chase experiment
  • Concerned the replication of genetic structure of viruses

4 Dec. 1908--- 22 May 1997

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1934 -1950Teaching and research at the Department of Bacteriology1936Held an instructorship in bacteriology and immunology 1936 -1939Work together with Professor J. J. Bronfenbrenner. 1938Became assistant professor 1942Became associate professor
what is t2
What is T2 ?
  • The T2 phage is a strongly toxic bacteriophage and tadpole-shaped virus
  • small virus that infect only bacteria
  • Contain 50% DNA and 50% protein
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Infect E-coli
  • Contains linear double-stranded DNA
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The infective cycle of T2 in E.coil
  • Virus attach to the surface of their host cell(a)
hershey chase experiment
Hershey ChaseExperiment
  • Radioactive Sulphur (35S)

non-radioative DNA?

  • Radioactive Phosphorous(35P)

radioactive DNA?

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Conclusion

DNA is the

GENTIC MARTERIAL!!!

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