Name ____________________________
Mitosis -- Internet Lesson
In this internet lesson, you will review the steps of mitosis 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 “Activities” then 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.
______________________________________
Chromatids are pulled apart
______________________________________
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 chromatids are visible at prophase? ___________
-- How many chromatids are in each daughter cell at the end of mitosis? _________
3. The little green T shaped things on the cell are ________________________.
Describe what happens to them during mitosis? _____________________________
4. Label each of the following phases.
_______________________
______________________
________________________
Another Mitosis Animation
Go to www.johnkyrk.com and click on the mitosis animation.
Prophase
Metaphase
Telophase
Onion Root Tip
Online Activity at http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html
Read the introduction, then click the “next” button.
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
Percent of Cells (calculate: number of cells
divided by total cells x 100)
Mitosis in Whitefish & Onion Roots
http://www.biologycorner.com/projects/mitosis.html
Answer the following questions and sketch the cells in your lab book direction are on the next page.
1. Why is the whitefish used to study mitosis?
2. What are the four stages of mitosis?
3. How long does it take for mitosis to complete? Why will most of the cells you view be in interphase?
For each organism
1.
Identify the stage of the cell cycle that it is in.
View 1
Whitefish
Onion
View 2
View 3
View 4
View 5
Name:________________________________
Using the images at http://www.biologycorner.com/projects/mitosis.html draw the different
phases of the cell cycle in your lab book. All drawings should be in pencil, should be labeled and
should include a brief description of what occurs during this phase. Use the checklist below to
make sure you have labeled everything correctly.
_____(2)
root tip.
Drawings are labeled as either “plant” or “animal” cells and whitefish blastula or onion
_____(5) Interphase is neatly drawn and labeled in pencil; the nucleus, nucleoli, and chromatin are
labeled.
_____(2) There is a brief description of Interphase beside the drawing.
_____( 6 ) Prophase is neatly drawn in pencil; chromosomes, chromatids, centromere, and
microtubules are clearly labeled.
_____(2) There is a brief description of Prophase beside the drawing.
_____(3) Metaphase is neatly drawn in pencil; the metaphase plate is clearly labeled.
_____(2) There is a brief description of Metaphase beside the drawing.
_____(5) Anaphase is neatly drawn in pencil; chromosomes, spindle fibers and poles are clearly
labeled.
_____(2) There is a brief description of Anaphase beside the drawing.
_____( 4 ) Telophase is neatly drawn in pencil; the nuclear envelope and cell plate/cleavage furrow
are
clearly labeled.
_____(2) There is a brief description of Telophase beside the drawing.
________/35Total
Graded By:_______________________________