Wednesday, November 3, 2010


Mitosis Tutorial
#1 Which stage does the following occur?

Chromatin condenses into chromosomes: Prophase
Chromosomes align in center of cell: Prometaphase
Longest part of the cell cycle: Interphase
Nuclear envelope breaks down: Prometaphase
Cell is cleaved into two new daughter cells: Prometaphase
Daughter chromosomes arrive at the poles: Telophase

#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?
There are 4 visible chromosomes at the beginning.

How many are in each daughter cell at the end of mitosis?
There are 8 daughter cells at the end of mitosis.

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

What happens to the centrioles during mitosis?
The centrioles moves around along with the movement of the chromosome, and eventually is separated from it's pair in the mother cell when developing the daughter cells.

#3 Identify the stages of these cells:
1) Metaphase
2) Cytokinesis
3) Prophase

Another Mitosis Animation
Prophase: The centrioles move to opposite sides of the cell, while the chromatin in the nucleus condenses and its membrane dissolves, and the chromosomes connect to their "sister" chromosome.
Metaphase: The sister chromosomes divide and attach to spindle fibers that exrtract them, while the chromosomes gravitate towards their corresponding poles (centrioles).
Telophase: The chromosomes pull at their opposite poles, splitting the cell in half to produce two daughter cells and making new membranes. The chromosomes return to their original, undetected, stringy state.

Onion Root Tip
# of cells:
Interphase: 20-57.142%
Prophase: 10-28.571%
Metaphase: 3-8.571%
Anaphase: 2-5.5%
Telophase: 1-2.7%
Total: 36-100%

Mitosis in Whitefish & Onion Root
View 1: Telophase
View 2: Metaphase
View 3: Prophase
View 4: Anaphase

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

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