Name: ________________________________________________ Date: ________________ Block: _______
The Biology Project: Mitosis
Directions: Follow the given instructions below to navigate through the website of the Biology
Project. Answer all of the following questions.
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Go to the website “The Biology Project” at www.biology.arizona.edu
Click Cell Biology (along the left side of the screen)
Click Cell Cycle and Mitosis link in the middle of the page
Click Mitosis (along the left side of the screen). Read the tutorial and use it to answer the
questions below.
1. How many daughter cells are produced from one cell during mitosis?
2. Interphase: What are two things the cell is doing during interphase?
3. Interphase: What is the dark spot within the nucleus that may be visible?
4. Prophase: What becomes visible during this step?
5. Prophase: What do the fibers that cross the cell form?
6. Metaphase: Where do the chromosomes line up in the cell during this phase?
7. Metaphase: When the chromosomes align along the metaphase plate, what does this ensure?
8. Anaphase: What happens to the chromosomes during this phase?
9. Telophase: Where do the chromosomes arrive?
10. Telophase: What forms around the daughter nuclei?
11. Cytokinesis: In animal cells, what is the role of the protein called actin?
12. Cytokinesis: In plant cells, what requires that a cell plate be made between the 2 daughter cells?
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At this point, click on and play the Mitosis Animation at the bottom of your screen.
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Go back to the homepage for the Biology Project by clicking on the blue Cell Biology link at the
bottom of your screen.
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Click on the box Online Onion Root Tips (see the big box along the left side of the screen)
13. Read through the text on the first page. Answer these questions as you read.
a. In plants, the root continues to grow searching for what?
b. In order to examine the cells in the tip of an onion, what must be done for the chromosomes
to be visible?
c. How many phases of the cell cycle have scientists divided the process into?
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Click next three times after you finish reading the page until you arrive at the page, which shows
you pictures of onion cells undergoing different phases of mitosis.
o Click on the correct phase of mitosis that the picture shows.
o When you are done identifying all 36 cells, record your results in the table below (you can
count the cells at the end)and then calculate the percent of all the cells in each phase of
mitosis.
Interphase
Prophase
Metaphase
Anaphase
Telophase
Total
# of cells
36
% of cells
100%
14. Based on your data from the table, make a pie chart representing the percent of cells in each stage
of the cell cycle.
a. What phase appears to be the longest phase? __________________________________________
b. What phase appears to be the shortest phase? _________________________________________