Cell Cycle Wheel
Question: How does a cell to go through a cell cycle?
Chap 10 “Cell Growth and Division”
Pg 281- (fig 10-7)
Text Resource:
Procedure:
1. Get two paper plates to make your wheel and your cover viewer. One whole plate will be
used to put all of your cell cycle information on, and the other will have the scalloped plate
edges trimmed to be the spinning cover viewer. (FYI: Just use one plate if you don’t want
a cover/viewer.)
2. Cells go through a life cycle, just like humans do. Since we’re made of cells, this should
make sense. Choose one of your plates to be the bottom plate with all the info about the
cell cycle. Neatly, divide the entire cell cycle plate into four even sections. Use fig 10-4 to
guide you in correctly labeling each of the four sections:
,
,
,
3. Cells, after they are made, go through growing cycles. During these phases, cells
assemble the materials in them to get ready to duplicate. Pick one section of your circle
and write “G1” in that space. Under “G1”, neatly write what happens during that phase:
G1 =
4. When a cell duplicates, it has to give the new cell a copy of the DNA for the new nucleus.
In the next section, going clockwise, write “S Phase”. Under “S Phase”, neatly write what
happens during S phase:
S=
5. Now that the cell has two copies of its DNA, it is ready to replicate itself. Before it can do
this, it has to go through another growing phase to get the materials ready in the cell to
split. In the next section, going clockwise, write “G2”. Under “G2”, neatly write what
happens during G2 phase:
G2 =
6. The final stage is the process called MITOSIS- which is the splitting of the nucleus. This is
just one section of the cell cycle, but a very important one. MITOSIS is made of four
different phases called PROPHASE, METAPHASE, ANAPHASE, and TELOPHASE.
CYTOKINESIS happens right after mitosis to divide cytoplasm as well, so we’ll include it
here. Divide the last section of their circle into five even (smaller) sections. Going
clockwise, write in the five sections:
Prophase
Metaphase
Anaphase
Telophase
(and) Cytokinesis
7. Use fig 10-5 in the text to neatly add an IMAGE and an verbal EXPLANATION of what’s
occurring in each phase of mitosis. Use your book as a resource, but try to use your own
words. Using colored pencils and labeling the structures involved will get you closer to an
“A” on your quiz and test!
8. We collectively call “G1”, “S Phase”, and “G2” INTERPHASE. Most of the cell’s life is
spent in interphase. Extend the line to the right of “G2” and to the left of “G1” to make a
section in the margin. In this section that encompasses “G1”, “S Phase”, and “G2”, write
“Interphase” in the scalloped plate margin (on the outside circle).
9. Remember that the four phases, Prophase, Metaphase, Anaphase and Telophase are all
together called MITOSIS. Write MITOSIS in the margin on the outside circle.
(Optional)
10. TO MAKE THE TOP COVER/VIEWER PLATE: Trim the scalloped edges to make your
cover/viewer plate. Pick up the trimmed cover/viewer plate. Divide the circle into four piepieces. Fold the circle in half, then in half again, to divide the circle evenly. Draw lines on
the folds. In other words, divide the circle into four quarters. Cut one of the quarters away
to expose only one section of the completed bottom information plate.
11. Place the smaller circle on top of the larger one you cut up earlier. Tape them together
with the smaller circle centered on top of the larger one.
Analysis Questions:
1. Write YOUR OWN (don’t copy it from your book!) definitions for the following vocabulary
words.
Cell cycleInterphase-
Mitosis-
Spindle Fiber-
Centriole-
Equator-
Centromere-
2. Not all cells in the body divide at the same rate. Hypothesize one kind of cell in the body
that you think goes through the cell cycle often and one that does not. Explain your
reasoning.
3. G1 and G2 are explained to be “getting ready” phases. What do you think are some of
the things a cell might have to do to “get ready to” grow and divide?