Download Mitosis Webquest

Name__________________________
Date ___________________________
Mitosis and Cell Cycle Web Quest
Follow the website links provided in order to answer the following questions
“Cells Alive” Mitosis Tutorial
http://www.cellsalive.com/mitosis.htm
Click the mitosis link on the left side of the screen. Read the text below the step by step animation and
also view the animation. You can slow down the animation by clicking step by step through the phases.
1) List the stages of mitosis in order. Notice that there is an extra phase here called
“prometaphase” which is an in-between phase between prophase and metaphase. You are not
responsible for this phase in our class.
2) In which phase of mitosis does each of the following occur:
Chromatin condenses into chromosomes _________________________________________
Chromosomes align in the center of the cell_______________________________________
The longest portion of a cell’s life cycle ___________________________________________
Nuclear envelope breaks down. ________________________________________________
Cell is cleaved into two new daughter cells _______________________________________
Daughter chromosomes arrive at the poles _______________________________________
3) After watching the video, why were there two chromatids of each color? (What process
occurred to each chromosome PRIOR to mitosis?)
4) How many chromosomes are present at the beginning of this mitosis cycle?___________
5) How many chromosomes are in each cell at the END of this mitosis cycle?___________
6) What are the green cylinders located in the cell during the animation? ___________________
7) What do these structures do during the process of mitosis?
8) Identify the stages of these cells:
9) Go to the following website:
http://plaza.ufl.edu/alallen/pgl/modules/rio/stingarees/module/what.html
What are two different reasons that cells go through cell division as indicated by the website?
10) Using the same website, indicate and DESCRIBE one of the main controls that cells use to control
cell division.
11) What is the function of microtubules in mitosis?
Onion Root Tip Lab Simulation
http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html
Read the introduction and then click the “next” button.
Check out and read the information about the different phases & click “next”
Read the assignment and then click next.
Classify each of the 36 cells into the correct phase. When finished, record the number of cells in each
phase in the table provided.
Interphase
Prophase
Metaphase
Number of
Cells
Percent of
Cells
Anaphase
Telophase
Total
36
100%
12) What stage were a majority of the cells in?
13) What evidence from this lab shows that mitosis is a continuous process and not a series of
separate events that happen all over the organism at the exact same time?
14) If this onion cell started has 24 chromosomes in one of its diploid cells, how many would we
expect to find in an onion’s gametes?
15) In allium, a flowering plant, interphase lasts about 15 hours and mitosis takes around 80
minutes. Assuming that each stage of mitosis takes the same amount of time, how many hours
old is a cell that is at the beginning of anaphase?
Cancer Cells
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20101/Bio%20101%20Lectures/Can
cer/cancer.htm
16) What is cancer according to this website?
17) Describe three different characteristics of cancer cells.
18) What types of cancers are associated with alcohol?
19) What is a tumor?
The Use and Controversy of Stem Cells: using the tutorials, answer the following questions
http://learn.genetics.utah.edu/content/stemcells/
20) What is a differentiated cell?
21) What is a stem cell?
22) According to United States law, where can scientists obtain stem cells for research?
23) List three difficult questions that have been raised due to stem cell research.