the cell cycle mitosis - loch on...
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The Cell CycleMitosis
Asexual Reproduction
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We shed 1.5 million skin cells every hour with a new skin surface every 28 days.
The process of asexual reproduction begins after a
sperm fertilizes an egg.http://www.the-simple-homeschool.com/cell-cycle-mitosis.html
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Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
Cells that reproduce by asexual reproduction reproduce constantly.
Mitosis Cyclehttp://www.cellsalive.com/mitosis.htm
Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase
Cytokinesis
Mito
sis
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• Chromosomes are copied (# doubles)• Chromosomes appear as threadlike coils
(chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase
CELL MEMBRANENucleus
Cytoplasm
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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• Mitosis begins• Centrioles (or poles) appear and begin to
move to opposite end of the cell. • Spindle fibers form between the poles.
CentriolesSister chromatids
Spindle fibers
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
Centrioles
• Chromatids (or pairs of chromosomes) attach to the spindle fibers at the centromere, and line up at the center of the cell.
Centrioles
Spindle fibers
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
• Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell as the cell stretches.
Centrioles
Spindle fibers
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
• Two new nuclear envelopes form.• Chromosomes appear as chromatin (threads
rather than rods).• Mitosis ends.
NucleiNuclei
Chromatin
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
• In animal cells, the membrane pinches inward to create two daughter cells – each with its own nucleus with identical chromosomes.
• In plant cells, a new section of cell wall forms between the two new nuclei forming two new daughter cells.
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Animated Mitosis Cyclehttp://www.youtube.com/watch?v=cvlpmmvB_m4&feature=youtube_gdata_player
Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase
Cytokinesis
Mito
sis
Animal Mitosis -- Review
Interphase Prophase
Metaphase Anaphase
Telophase Interphase
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Plant Mitosis -- ReviewInterphase Prophase
Metaphase Anaphase
Telophase Interphase
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InterphaseProphaseMetaphaseAnaphaseTelophaseCytokinesis
IPMATC
I Pray More At The Church
IPMATC
IPMATC
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http://www.cellsalive.com/mitosis.htm
Mitosis Bead Activityhttp://www.youtube.com/watch?v=zGVBAHAsjJM
&feature=youtube_gdata_player