1.    Prokaryote cells: Go to the following site to learn about prokaryote cells:
a.   <http://web.mit.edu/esgbio/www/cb/prok_euk.html>
<http://www.cellsalive.com/cells/bactcell.htm>
<http://en.wikipedia.org/wiki/Binary_fission>
b.   Name three ways prokaryote cells differ from eukaryote cells (name characteristics of the prokaryote cells):
c.    Draw a prokaryote cell
d.   What process do prokaryote cells use to divide?

2.   Prokaryote cells use a process called binary fission to divide. Go to the following site for the definition of binary fission:
a.    http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookglossB.html#binary%20fission
b.   Write down the definition of binary fission:

3.   To watch an animation on binary fission, go to
a.    http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookmito.html

Eukaryote Cell Division

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

2.   There are several parts of the cell involved in cell division. Click on the parts shown at the following site and read what they do.
a.    http://plaza.ufl.edu/alallen/pgl/modules/rio/stingarees/module/index.html

3.   The following sites explain about and show the spindle fibers:
a.    http://www.biologylessons.sdsu.edu/classes/lab8/glossary.html
b.   <http://www.counterbalance.net/biogloss/mitspin-body.html>

4.   DNA can take many forms. When the cell is resting, it takes the form of chromatin. Look at chromatin in the following sites:
a.    http://rumour.biology.gatech.edu:16080/people/jmears/research/chromatin.jpg
b.   http://www.cgl.ucsf.edu/chimera/ImageGallery/entries/large_images/chromatin3-large.png

5.   When the cell needs to divide, the DNA must coil up tightly into chromosomes. When DNA has not copied itself, the chromosomes will only have one strand. These strands are called chromatids. After DNA replicates, each strand (chromatid) has a twin that is attached to it. These pairs of twin chromatids are called sister chromatids. Sister chromatids are connected by a centromere. See what chromatids and sister chromatids look like at the following sites:
a.    http://genetics.gsk.com/graphics/chromosome.gif
b.   http://www.geosciences.unl.edu/~dbennett/images/mitosis_prometafaze.jpg
c.    http://library.thinkquest.org/28751/review/division/1.html
d.   http://www.science.siu.edu/plant-biology/PLB117/JPEG%20files/8-13Raven.jpg
e.    Go to the following site, and page down to the part that says “what does a chromosome look like” to compare chromatin, chromatid, and sister chromatids:    http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Lectures/Mitosis/mitosis.htm

6.   There are three main steps in the cell cycle (Interphase, mitosis, and cytokinesis). You can see these at the following site:
a.    http://ridge.icu.ac.jp/gen-ed/cell-division-gifs/02cell-div-basic-1.GIF
b.   Draw and label the three stages.

7.   Read the first few sentences at the following website:
a.    http://dwb.unl.edu/Teacher/NSF/C08/C08Links/www.teaching-biomed.man.ac.uk/ramsay/Growth.htm

8.   Go to the following site to find out what happens in cytokinesis:

9.   Cell cycle in a plant cell is different than the cell cycle in an animal cell. Go to the following site and look at the photographs of division in a plant cell:
a.    http://ridge.icu.ac.jp/gen-ed/cell-division-gifs/11cell-div-plant(DIC).GIF
b.   How are the last two stages (cytokinesis) in the plant cell different from animal cells?

Great animations of mitosis and the cell cycle:

Stages of Mitosis

1. For an overview of what Mitosis looks like, go to the following site and watch the animation:

http://www.johnkyrk.com/mitosis.html

2. Go to the following site, and then scan down to Overview of the Cell Cycle.

http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Lectures/Mitosis/mitosis.htm

a. Go into paint and draw the four phases of mitosis (prophase, metaphase, anaphase, and telophase). Label each phase and write down the things that happen in each one. Cut and paste your work to a word document and print it out.

4. We will be doing a lab where you will look at mitosis in whitefish and onion. Go to the following sites and study mitosis in these organisms.

1. Look at the pictures of mitosis in a whitefish. Put your pointer over each picture and read the description at the bottom of the screen:

http://biog-101-104.bio.cornell.edu/BioG101_104/tutorials/cell_division/wf_review_fs.html

2. Go to the following site and look at motisis in an onion cell. Point at each picture to read a description of the stage at the bottom of the screen.

http://biog-101-104.bio.cornell.edu/BioG101_104/tutorials/cell_division/onion_review_fs.html

3. Based on the two tutorials, which shows a cell plate forming between the two new nuclei?
4. Which shows the cell pinching in half

http://biog-101-104.bio.cornell.edu/BioG101_104/tutorials/cell_division.html

1. How many answers did you get correct?

http://www.bio.unc.edu/faculty/salmon/lab/mitosis/Easter%20lily.mov

http://www.bio.unc.edu/faculty/salmon/lab/mitosis/Bloodlily.mov

http://www.bio.unc.edu/faculty/salmon/lab/mitosis/polscopenewt.mov

2. Which two movies showed a cell plate (looked like a line) growing through the middle of the cell after the chromosomes were pulled to opposite sides? Based on this, which kinds of cells do you think separate by growing a cell plate through the center of the cell (plant cells or animal cells)?
3. In which movie could you see the spindle fibers the best? Did you see how they shortened, pulling the chromosomes to opposite sides of the cell?
4. What stage were the cells in when the chromosomes were pulled to opposite sides of the cell?
5. What stage were the cells in when the chromosomes lined up in the middle of the cell?
6. What stage were the cells in when the cell plate was starting to form between the two new groups of chromosomes