Wednesday, November 3, 2010

Mitosis Worksheet

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.Cytokinesis
Daughter chromosomes arrive at the poles.Telophase



2. 


How many chromosomes are visible at the beginning of mitosis? Eight.

How many are in each daughter cell at the end of mitosis? Eight.

The little green T shaped things on the cell are: centrioles.

What happens to the centrioles during mitosis? The centrioles divide.

3. Identify the stages of these cells.
 
              Metaphase                                    Telophase                                  Prophase

4. Describe stages of mitosis according to the animation.
Prophase

 The chromosomes condense. The nucleus dissipates. Centrioles migrate to opposite sides of the cell.
Metaphase

 Spindle fibers attach to chromosomes. Chromosomes align on the metaphase plate.
Telophase

 The nuclear envelope reforms. The chromosomes disperse. The spindle fibers dissolve, and the cell is pinched in two by actin protein.

5. Record data in the chart below.


InterphaseProphaseMetaphaseAnaphaseTelophaseTotal
Number of cells201032136
Percent of cells
(calculate: number of cells divided by total cells x 100 )
5527852100 %


6. For each organism, identify the stage of mitosis.


View 1
View 2
View 3
View 4
View 5
Whitefish Telophase Metaphase Prophase AnaphaseN/A
Onion Anaphase Metaphase Interphase InterphaseTelophase

Yes, I know the formatting is horrible.  I blame blogger.