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cell cycle and mitosis webquest

Cell Cycle and Mitosis Webquest                Name ____________________________________

 

Prokaryotic Cell Division:

Go to the following sites to learn about prokaryote cells:
http://www.cellsalive.com/cells/bactcell.htm
http://en.wikipedia.org/wiki/Binary_fission

 

  1. Name three ways prokaryote cells differ from eukaryote cells (name characteristics of the prokaryote cells):

 

  • __________________________

 

  • __________________________

 

  • __________________________

 

  1. Draw a prokaryote cell

 

 

 

 

 

 

 

  

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

 

  1. Write the definition of binary fission: ____________________________________________

 

______________________________________________________________________________

 

Watch the animation on binary fission: http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookmito.html and click on “Prokaryotic Cell Division”

 

  1. Describe what you saw in the animation. How does binary fission work:

______________________________________________________________________________

 

______________________________________________________________________________

 

Eukaryotic Cell Division:

There are several reasons for the 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 the two reasons shown for cell division.

 

  • ______________________________

 

  • ______________________________

 

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.
http://plaza.ufl.edu/alallen/pgl/modules/rio/stingarees/module/index.html

  1. List the four organelles involved in cell division.

 

  • ____________________________

 

  • ____________________________

 

  • ____________________________

 

  • ____________________________

 

DNA can take many forms. When the cell is resting, it takes the form of chromatin. Look at chromatin in the following site:
http://www.cgl.ucsf.edu/chimera/ImageGallery/entries/large_images/chromatin3-large.png

  1. Describe the appearance of chromatin? ___________________________________________

______________________________________________________________________________

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 on the following site:
http://library.thinkquest.org/28751/review/division/1.html

  1. Draw and label a picture of the sister chromatids and the centromere.

 

 

 

 

 

 

 

 

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.

 

  1. List the 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 my class you are only responsible for knowing PMAT)

 

  • __________________________

 

  • __________________________

 

  • __________________________

 

  • __________________________

 

  1. In which stage does each of the following occur:
     

 

 

Chromatin condenses into chromosomes

 

 

Chromosomes align in center of cell.

 

 

Longest part of the cell cycle.

 

______

 

Nuclear envelope breaks down.

 

 

 

Cell is cleaved into two new daughter cells.

 

 

Daughter chromosomes arrive at the poles.

 

 

  1. Identify the stages of mitosis in these cells:

 

 

  ____________           _______________           _______________      _______________

Onion Root Tip - Online Lab Activity: http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html

*Read the introduction, then click the “next” button.

*Check out the different phases & read them & hit “next”.

*Read the “assignment” then hit “next”

*You will have 36 cells to classify. When you're finished, record your data in the chart below.

 

 

Interphase

Prophase

Metaphase

Anaphase

Telophase

Total

Number of cells

 

 

 

 

 

 

36

Percent of cells

 

 

 

 

 

 

100%

(calculate percentage: number of cells divided by total cells x 100 )

 

 

  1. What do you notice about the stages from your calculations in the table?

 

 

 

 

 

  1. What did you notice about the difference between Interphase & Prophase?

 

 

 

 

 

For Fun:

http://www.quia.com/servlets/quia.activities.common.ActivityPlayer?AP_rand=1538401416&AP_activityType=12&AP_urlId=3371&AP_continuePlay=true&id=3371

1. Read the instructions on the web site and complete the activity asked.

2. When you have successfully completed the activity, you will see “You Win” and you can see the hidden picture. PRINT this page out and attach it to your packet.

 

http://www.quia.com/rr/89527.html

1. Press “Start” on Rags to Riches game!!

2. Answer the questions to gain $$!!

3. You must at least make $250,000. Once you pass this point you must PRINT out this page and attach it to the packet for credit.

4. Be careful because if you answer incorrectly, you will have to start over!

 

For an overview of what Mitosis looks like, go to the following site and watch the animation: http://www.johnkyrk.com/mitosis.html

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, print it out and attaché it to your packet.

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