Download mitosis web-lesson - Southington Public Schools

Name:
Period: ____________
MITOSIS WEB-LESSON
(Thanks to Thomas Peri of Notre Dame Prep in Baltimore, MD for creating this activity)
In this internet lesson, you will review the stages of mitosis and view video simulations of cell division. You
will also view an onion root tip and calculate the percentage of cells at each stage in the process.
1.
Go to the following website: http://www.cellsalive.com/ . Below the section: “Interactive Eukaryote
Cell Cycle”, click on the link to “MITOSIS.” Read the text on the page and view the animation. It
helps a lot if you slow down the video by clicking step by step through the phases.
2. List the stages of Mitosis (in order):
_______________________
_______________________
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3. In which stage does each of the following events occur?
a. Chromatin condenses into chromosomes:
_______________________
b. Chromosomes align in the center of the cell:
_______________________
c. Two separate nuclei form:
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d. Nuclear membrane breaks down:
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e. Cell is cleaved into two new daughter cells:
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f. Daughter chromosomes arrive at the cell’s poles
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g. Centrioles move to opposite poles of the cell:
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4. Watch the video carefully. The little green “T” shaped things are the Centrioles. The colored
chromosomes represent and attached pair of chromatids. There are two of each color because one is
an exact duplicate of the other.
a. How many chromosomes at the end of prophase:
_______________________
b. How many are in each daughter cell at the end:
_______________________
c. What happens to the Centrioles during mitosis:
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Go to the following web site: http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html
5. Read the introduction and instructions, clicking “next” to advance until you get to the cells to classify
(after the chart similar to below. You will have 36 cells to classify. When you finish, record the data
in the chart below. Count a second set of data from a mitosis image in my website:
http://www.southingtonschools.org/uploaded/faculty/ddeboer/Chem_and_Cells/Mitosis%5BOnionRoot3%5D.jpg
NUMBERS
Actual Cell
Number
Percent of
Total Cells
Cells in Phase
of Bio-Image
Scan #2
Percent of
Total Cells
INTERPHASE
PROPHASE
METAPHASE
ANAPHASE
TELOPHASE
TOTAL
36
100%
100%