The Cell Cycle: computer simulation
Name_______________________________
Hour ________
Standard #2: Explain the Events of the Cell Cycle
• Explain the purpose of cell division.
• Explain all the phases of the cell cycle in detail
• Compare and contrast the differences between plant and animal cells during the cell cycle.
Website: www.nobelprize.org/educational_games/medicine/2001/cellcycle.html
1. What happens to the cell in the middle when you click on it?
2. What happens when you click on it again?
Press the enter button
3. Why do cells divide?
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4. How many cells are replaced every minute?
5. How does a cell know when to divide?
6. What 2 molecules control cell division? ____________________ and ___________________
Go through the door of the “Control System”. Press the button to begin.
Step 1: Click on cell growth
What phase have you entered into for the cell cycle
You are at checkpoint 1: List the 2 things that happen at checkpoint 1
1. ________________
2. _________________
Step 2: Click on Chromosome duplication
7. What is duplication?
Step 3: Click on cell growth (Gap 2)
You are at Checkpoint 2: What 3 things happen at this checkpoint?
1. ___________________________________
2. ___________________________________
3. ___________________________________
Repair Cell if needed
Step 4: Click on chromosome separation
8. What phase of the cell cycle are you in now?
You are at checkpoint 3: What happens at this checkpoint?
Step 5: Click on Cell Division
9. What happens at this step?
10. What are the 4 steps of the cell cycle?
11. What happens when a “supervisor” does not work properly?
12. What happens when the supervisor finds something wrong at the last checkpoint?
Mitosis Internet Lesson
In this internet lesson, you will review the steps of mitosis and meiosis and view video simulations of cell division.
You will also view an onion root tip and calculate the percentage of cells at each of the stages of cell division.
Mitosis Tutorial
http://www.cellsalive.com/
On the left side of the screen is a navigation bar, click on the link to “MITOSIS” Read the text on this page and
view the animation, you can slow down the video by clicking step by step through the phases.
1. Which stage does 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. _____________________________________________
Watch the video carefully.
2. The colored chromosomes represent chromatids. There are two of each color because one is an exact duplicate
of the other.
How many chromosomes are visible at the beginning of mitosis? ________________
How many are in each daughter cell at the end of mitosis? __________________
The little green T shaped things on the cell are: ____________________________
What happens to the centrioles during mitosis? _____________________________
3. Identify the stages of these cells:
__________________________
____________________________
_____________________
Another Mitosis Animation
Go to: http://www.johnkyrk.com/mitosis.html
View the animation sketch the cell in and write a description of what is happening:
Interphase
Prophase
Metaphase
Anaphase
Draw
Description
of events
MITOSIS PART I
Go to : http://www.sci.sdsu.edu/multimedia/mitosis
1. What is mitosis
2. Cells that are non-reproductive undergo mitosis. Which are the reproductive cells?
3. Mitosis occurs in eukaryotic cells. Describe a eukaryotic cell.
Telophase
Mitosis in Whitefish & Onion Roots
http://www.biologycorner.com/projects/mitosis.html
Whitefish: http://www.biologycorner.com/projects/mitosis/whitefish_embryo.html
Onion: http://www.biologycorner.com/projects/mitosis/onion_root.html
For each organism, identify the stage of mitosis.
View 1
Whitefish Cell
Onion Cell
View 2
View 3
View 4
View 5