Biologist ___________________________
DNA Timeline
Date ______________
Choose one of the following scientists whose research falls somewhere on DNA’s timeline.
Briefly describe their significant findings in terms of DNA as well as the year they made
their discoveries.
1. Friedrich Miescher
2. Erich Von Tschermak-Seysenegg
3. Thomas Hunt Morgan
4. Barbara McClintock
5. Joshua Lederberg
6. Evelyn Witkin
7. Erwin Chargaff
8. Rosalind Franklin
9. Hershey and Chase
10. Watson and Crick
11. Paul Charles Zamechik and Mahlon Hoagland
12. Author Kornberg
13. Sydney Brenner
14. Craig Venter
15. Oswald Avery
16. Kary Mullis
17. Alec Jeffereys
18. Mario Renato Capecchi
19. Francis Collins
20. John Sulston
DNA Timeline Guide
1. Friedrich Miescher – discovery of DNA (1875)
2. Erich Von Tschermak-Seysenegg – rediscovery of mendel’s laws (1908)
3. Thomas Hunt Morgan – genetics of fruit flies (1912)
4. Barbara McClintock – Jumping genes (1931)
5. Joshua Lederberg – conjugating bacteria (1943)
6. Oswald Avery – Transforming factor (1944)
7. Erwin Chargaff – rules for base pairing (1944)
8. Evelyn Witkin – DNA repair (1945)
9. Rosalind Franklin – x ray structure of DNA (1952)
10. Hershey and Chase – blender experiment (1952)
11. Watson and Crick – double helix (1953)
12. Paul Charles Zamechik and Mahlon Hoagland – tRNA (1956)
13. Author Kornberg – DNA (1957)
14. Sydney Brenner – mRNA (1961)
15. Kary Mullis – invented PCR (1982)
16. Alec Jeffereys – Developed DNA fingerprinting (1988)
17. Mario Renato Capecchi – homologous recombination (1989)
18. Craig Venter – human genome (2000)
19. Francis Collins – Human genome (2001)
20. John Sulston – genetic regulation of the cell cycle (2002)