Name:_____________________
Date:________________
Hour:________________
DNA Experiments (Independent Notes)
Directions: Complete these notes as we go through chapter 13.1 (Pages (412-417) together as a
class.
Competencies:
8. Obtaining, evaluating, and communicating information.
11. Evaluate inheritance and variation of traits resulting from heredity.
1. Deoxyribonucleic acid (DNA) is key to life on Earth. Do bacteria have DNA?
Y or N
Griffith’s Experiments (Pages 412-414):
2. What are the two bacteria types that Griffith used? What was the difference between
them?
Type 1: _______________________________________________________________________
Type 2: _______________________________________________________________________
Difference: ____________________________________________________________________
3. What happened when the bacteria were heat treated? Why would Griffith do this?
4. Explain the four different results that Griffith saw:
a. __________________________________________________________________
b. __________________________________________________________________
c. __________________________________________________________________
d. __________________________________________________________________
5. Griffith called the phenomenon of these experiments “bacterial transformation”. What
does the term transformation mean?
Name:_____________________
Date:________________
Hour:________________
Hershey-Chase Experiments (Pages 414-415):
6. What is a bacteriophage? What do they do?
7. Which two chemicals did Hershey and Chase grow their bacteriophages in?
Chemical 1: ___________________________________________________________________
Chemical 2: ___________________________________________________________________
8. What happened to the bacteria that was infected with the P-32 bacteriophage?
9. What happened to the bacteria that was infected with the S-35 bacteriophage?
10. What did Hershey and Chase learn about the method of infection bacteriophages from
these experiments?
11. Explain the three main roles of DNA.
a. __________________________________________________________________
b. __________________________________________________________________
c. __________________________________________________________________