DSQ: Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals?
Mrs. Camp
7 th Grade Life Science
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How do little elephants grow up to be BIG elephants?

The process of asexual reproduction (cell life cycle) begins after a sperm fertilizes an egg.

Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
Cell that reproduce by asexual reproduction reproduce constantly.

http://www.cellsalive.com/mitosis.htm
Cell Life Cycle Stages
• Interphase
• M1- Prophase
• M2- Metaphase
• M3- Anaphase
• M4- Telophase
• Cytokinesis

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Chromosomes and ALL organelles are
copied.
Chromosomes appear as threadlike coils
(chromatin) at the start, but are almost invisible with a light microscope.
Nucleus
CELL
MEMBRANE
Cytoplasm

Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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Mitosis begins. Chromosomes visible.
Centrioles (or poles) appear and begin to move to opposite end of the cell. (Not in
Plants)
Spindle fibers form between the poles.
Centrioles
Sister chromatids
Spindle fibers

Animal Cell
Spindle fibers
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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Chromatids (or pairs of chromosomes) attach to the spindle fibers in middle of cell.
Centrioles
Spindle fibers

Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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Chromatids (or pairs of chromosomes) separate and begin to move toward opposite ends of the cell.
Centrioles
Spindle fibers

Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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Chromosomes are at across ends of cell.
Chromosomes appear as chromatin (threads rather than rods).
Two new nuclei form
Mitosis ends.
Nuclei Nuclei
Chromatin

Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

Animal Cell Life Cycle - Review
Interphase M1-Prophase
M2- Metaphase
M4- Telophase
M3- Anaphase
Cytokinesis

Plant Cell Life Cycle -- Review
Interphase M1- Prophase
M2- Metaphase
M4- Telophase
M3- Anaphase
Cytokinesis
Cell Wall Plate Forms

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- Cell Division
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http://www.cellsalive.com/mitosis.htm