Name_________________________________________
Cell Cycle Analysis
Purpose: To observe the steps of Interphase, Mitosis, and Cytokinesis in cells. You will estimate the
relative duration of each phase above as well as each individual phase of mitosis.
Procedure: Using the microscope pictures as your references, count the number of cells that are in each
phase. Then, calculate the average time spent in each phase. Record your answers on the table that
follows each picture.
Remember- cells spend most of their time in INTERPHASE!
References:
Interphase
M e t a p h a s
P
e
A
r
n
o
a p
p
h
a
s
h
a
s
e
Telophase
e
Stage
Number of Cells
Percent Time in Each
=
# of cells in stage
x 100
Total # of cells on card
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Total # of cells
0
0
100%
Stage
Number of Cells
Percent Time in Each
=
# of cells in stage
x 100
Total # of cells on card
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Total # of cells
0
0
100%
Stage
Number of Cells
Percent Time in Each
=
# of cells in stage
x 100
Total # of cells on card
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Total # of cells
0
0
100%
Analysis of Results:
1. What is the cell cycle?
2. Describe what happens to each of the following during the cell cycle:
a) Nuclear Membrane
b) Spindle fibers
c) DNA
3. Using your data:
A) Average the percents from above:
Stage
Average percent time as calculated from the
three different charts from above:
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
B) Construct a pie graph showing the time spent in each stage.
4. Which stage do the cells spend the most time in? Why?