Name: _________________________________________
TOC#_____
Objective:
Create a timeline highlighting the major events that led to the discovery of the DNA molecule and its
structure. Use pages 350-358 in your IS textbook and the PowerPoint to complete the following activity.
This will be kept in your binder and complete in the place of notes for this PowerPoint. Make sure you
still answer the online questions.
Materials: Ruler
legal sized sheet of paper
tape
cut-out pieces (page 3)
sheet with questions
five pieces of index card
scissors
glue
“Special notes” Instructions:
1. At home, you will read pages 350-358 in the IS textbook and the PowerPoint “Discovering of
DNA” to analyze the contribution of the five following scientist groups to the discovery of the
DNA molecule and its structure.
a. Griffith
b. Avery
c. Chargaff
d. Franklin and Wilkins
e. Watson and Crick
2. Once you feel comfortable with their contribution and their experiments you will create a flash
card for each scientist.
3. Use a note card and glue the appropriate picture that represents or illustrates the experiments
associated with that scientist or the results of their experimentation (these pictures are found on the
last page). Write their name on the bottom of the card. On the back of the card, summarize their
experiment in your own words and record the results of the experiment. Be concise! Use the pages
350-358 of the IS textbook and the PowerPoint as a resource.
Picture of
the
experiment
by the
scientist
Summarize the
experiment in
your own words.
Record the
results of the
experiment.
Name of
Scientist
Front of note card (left)
Back of card (right)
4. Bring these to class with you on the following day in order to complete the activity together .
1
Name: _________________________________________
TOC#_____
In class Time Line creation.
1. Take your large sized sheet of paper and fold over (hot dog style) approximately 8cm from the
bottom.
Leave an 8cm border
2. Tape the seams neatly. Check out my example.
3. Fold your paper like an accordion (approximately 3.5 inches) until you have created 5 even panels
with pockets.
Each fold should be 3.5
4. Now, read pages 350-358 again in the IS textbook and the PowerPoint “History of DNA” to analyze
the contribution of the five following scientists to the discovery of the DNA molecule and its structure.
a. Griffith
d. Franklin and Wilkins
b. Avery
e. Watson and Crick
c. Chargaff
6. You will place the picture, name, and date on the front of one foldable section of your time line. On the
top portion of each panel, you will neatly summarize in a few words their overall contribution to our
understanding of the DNA molecule and its structure. Pictures can be found on page 3.
1 of 6 overall panels
Overall contribution to
our understanding of the
DNA molecule and its
structure (in a few
words).
Name of scientist(s)
Correct Date of
Experimentation
7. Once all five scientists have been completed, answer the associated questions that have been written on
the cut-out sheet in complete sentences on the back of the foldable (see example).
2
Name: _________________________________________
TOC#_____
Analysis Questions: Please answer ALL questions on the back of the foldable
1.
We did not discuss Levene’s discovery. Explain what he discovered, when, and why it was an
important contribution.
2.
We did not discuss Hershey and Chase’s experiment. Describe and date their experiment and
the contribution that they made to the determination of DNA as the transforming material.
3.
We did not discuss Pauling’s experiment. Describe and date their experiment and the
contribution that he made.
4.
Describe three of the functions of DNA for which Watson and Crick’s model provided an
elegant solution.
5.
If the amount of A is the same as T and G is the same as C, what would you assume about
DNA structure?
6.
We discussed many scientists’ discoveries, and sometimes they were working toward the same
goal. Why is it important to share research information? Why do some scientists not like to
share?
7.
Why did Hershey and Chase grow viruses in cultures that contained both radioactive
phosphorus and radioactive sulfur? What might have happened if they had used only one
radioactive substance?
3
Name: _________________________________________
TOC#_____
Cut-out Sheet and Analysis Questions (on the next page)
Instructions: Cut these out and unscramble in correct chronological order on your foldable.
Note: The below table is not in correct order; the pictures, names, and date do NOT match. YOU need to match the picture to the
name and date.
Oswald Avery
Franklin & Wilkins
Erwin Chargaff
Frederick Griffith
Watson & Crick
1953
1952
1928
1950
1944
Place the following pictures and names on the note card that go in the pockets of the timeline.
Note: The below table is not in correct order; the pictures and names do NOT match. YOU need to match the picture to the name.
Oswald Avery
Franklin & Wilkins
Erwin Chargaff
4
Frederick Griffith
Watson & Crick