Mitosis

Mitosis Tutorial:
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.
Anaphase.

Nuclear envelope breaks down.
Prometaphase.

Cell is cleaved into two new daughter cells.
Cytokinesis.

Daughter chromosomes arrive at the poles.
Telophase.
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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 chromosomes are visible.

-- How many are in each daughter cell at the end of mitosis?
Four chromosomes are in each daughter cell.

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

-- What happens to the centrioles during mitosis?
The centrioles gravitate towards the poles of the cell during mitosis, and separate the cell.

3 . Identify the stages of these cells:
The first image is of a cell in metaphase.
The second image is of a cell in cytokinesis.
The third image is of a cell in prophase.
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Another Mitosis Animation:

Prophase: The centrioles begin to go towards the cellular poles, and the chromosomes fully form. Also, they spread out.

Metaphase: In metaphase, the spindle fibers attach to the chromosomes and the chromosomes align in the center of the cell.

Telophase: In telophase, the nuclear envelope forms, and chromosomes go towards the poles of the cell, to finally split the cell into two daughter cells.
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Onion Root Tip - Online Activity

Number of Cells:
Interphase: 20
Prophase: 10
Metaphase: 3
Anaphase: 2
Telophase: 1
Total: 36
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Percent of Cells:
Interphase: 55%
Prophase: 28%
Metaphase: 8%
Anaphase: 6%
Telophase: 3%
Total: 100%
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Mitosis in Whitefish and Onion Roots

Whitefish
View 1: Telophase
View 2: Metaphase
View 3: Prophase
View 4: Anaphase

Onion
View 1: Prophase
View 2: Metaphase
View 3: Prophase
View 4: Telophase
View 5: Anaphase