Mitosis

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	____Prophase_______________________________
Chromosomes align in center of cell.	_____Metaphase_____________________________
Longest part of the cell cycle.	_____Interphase_____________________________
Nuclear envelope breaks down.	___Prometaphase____________________________
Cell is cleaved into two new daughter cells.	___Anaphase________________________________
Daughter chromosomes arrive at the poles.	____Telophase______________________________

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? ______6__________

-- How many are in each daughter cell at the end of mitosis? _______4___________

--The little green T shaped things on the cell are: _________Centrioles_____________

-- What happens to the centrioles during mitosis? ______They divide___________

3 . Identify the stages of these cells:

Metaphase                                               Cytokenisis                                                  Prophase

Another Mitosis Animation

Go to www.johnkyrk.com/mitosis.html

View the animation and sketch the cell in:

Prophase The chromosomes organize and the centrioles move

Metaphase  Spindle fibers attach to chromosomes

Telophase The nuclear envelope forms and the cells start to split

Onion Root Tip - Online Activity

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	20	10	3	2	1	36
Percent of cells (calculate: number of cells divided by total cells x 100 )	55%	28%	8%	6%	3%	100 %

Did you forget a calculator -- no problem. Go to www.calculator.com and click on the “fractions” calculator. A window with a virtual calculator will open and you can do the math from there.

Mitosis in Whitefish & Onion Roots

http://www.biologycorner.com/flash/mitosis.html
For each organism, identify the stage of mitosis.

	View 1	View 2	View 3	View 4	View 5
Whitefish	Cytokenisis	Metaphase	Prometaphase	Anaphase
Onion	Anaphase	Prometaphase	Prophase	Interphase	Telephase