Mitosis

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

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?: Four

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

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

-- What happens to the centrioles during mitosis? In the process of mitosis, during the interphase, the centrioles divide.

3 . Identify the stages of these cells:
Metaphase
Cytokinesis
Prophase

Another Mitosis Animation
Go to www.johnkyrk.com/mitosis.html

View the animation and describe the cell in:
Prophase
Centrioles move to the opposite sides of the cell and a spindle fiber network is created. The chromatin condenses into chromosomes and the nucleus fades.

Metaphase

The spindle fibers cause tension that causes a single plane of chromosomes on the metaphase plate.

Telophase
The daughter chromosomes disperse to the poles and the spindle fibers disappear. The nuclear envelope disappears.

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