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Mitosis Webquest



The Big Idea of Mitosis:

Go to the following website: http://www.biology4kids.com/files/cell2_mitosis.html
  1. What is the “big idea” of mitosis?

  1. How do the two new daughter cells compare to the original cell?

  1. Why is interphase called the “resting state” of the cell?



Why divide?

There are several reasons for a cell to divide. Two reasons are shown at the following website:http://plaza.ufl.edu/alallen/pgl/modules/rio/stingarees/module/what.html
  1. Name and describe the two reasons shown for cell division.

What do chromosomes look like?

When the cell needs to divide, the DNA must coil up tightly into chromosomes. When DNA has not copied itself, the chromosomes have only one strand. These strands are called chromatids. After DNA replicates, each strand (chromatid) has a twin attached to it. These are now called sister chromatids, and they are connected by a centromere. Visit this website

http://www.macroevolution.net/diagram-of-chromosome.html
  1. Draw a picture of a chromosome. Label the whole chromosome, the centromere, and a chromatid.










Stages of Mitosis:

Go to the following website: http://www.cellsalive.com/mitosis.htm On the left side of the screen is a navigation bar, click on the link to “MITOSIS”. View the animation and read the text below the animation on this page.



List the four stages of mitosis (Notice – there’s an extra phase here…”prometaphase” – sometimes that is added as an “in-between” phase between prophase and metaphase. In this class you are only responsible for PMAT).

1._ 2._ 3. _ 4. ___
  1. In which stage does each of the following occur?

Stage
Description

Chromatin condenses into chromosomes

Chromosomes align in center of cell

Longest part of the cell cycle

Nuclear envelope breaks down

Cell is cleaved (divided) into two daughter cells

Daughter chromosomes arrive at the poles

Daughter chromatids are pulled apart



Another Mitosis Animation



Go to the following website: http://www.johnkyrk.com/mitosis.html. Draw a cell in each of the following phases (click and hold down your cursor to pause the animation):
Prophase
Metaphase
Anaphase
Telophase







Go to: http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html and read the introduction.

  1. What kinds of cells will you be looking at in this activity?



Click “Next.” Read about the major phases in the life cycle of the cell. Then click “Next.”
Now you’ll read about the assignment to classify cells based on what phase they are in. Then click “Next.” You will have 36 cells to classify. Use the following table to record your data:

Interphase
Prophase
Metaphase
Anaphase
Telophase
Total
Number of cells





36
Percent of cells





100%







If you finish early, try these mitosis games. You should not be on any other website besides those listed on this webquest!!!



http://www.centreofthecell.org/interactives/mitosis/index.php



http://www.quia.com/pp/3371.html?AP_rand=98647523



http://sciencereviewgames.com/srg/games/ps.php?id=127