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Mitosis. Danielle Greenwald Emily Lynch Period 4. Prophase. Metaphase. Mitosis. - PowerPoint PPT Presentation
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Mitosis
Danielle GreenwaldEmily Lynch
Period 4
MitosisMitosis is the process of cell division which results in the production of two daughter cells from a single cell, identical to one another and to the original parent cell. Mitosis can be divided into the following four principals stages.
Prophase
Metaphase
Anaphase
Telophase
Works Cited
Prophase Nucleoli disappear Chromatin fibers become more tightly coiled Each duplicated chromosome appears as two identical sister
chromatids joined at the centromere Mitotic spindle forms in the cytoplasm Centrosomes move away from each other Nuclear envelope fragments Spindle fibers extend from each pole toward the equator of the
cell Kinetochore microtubules throw chromosomes into agitated
motion Nonkinetochore microtubules radiate from the poles toward the
cell’s equator without attaching to chromosomes PICTURES
DIAGRAMHOME
Metaphase Centrosomes at opposite poles of cell Chromosomes convene on the metaphase plate Centromeres of chromosomes align Chromatids of each chromosome are attached to
kinetochore microtubules of the spindle
PICTURES
DIAGRAMHOME
Anaphase Centromeres of each chromosome divide Each chromatid is now a chromosome Spindle moves the once- joined sisters toward
opposite poles of the cell Poles of the cell move farther apart By the end, each pole has equivalent collections of
chromosomes
PICTURES
DIAGRAMHOME
Telophase Daughter nuclei begins to form at the two poles Nucleoli reappear and chromatin fiber becomes
less tightly coiled The cleavage furrow forms and begins pinching the
cell in the center in animal cells. In plant cells, the cell wall begins forming in the center of the cell and grows outward.
Two identical daughter cells follow shortly after mitosis with cytokenesis
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PICTURES
DIAGRAM
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Animal cell
Plant cell
Backto
Prophase
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Animal cell
Plant cell
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Metaphase
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Plant cell
Animal cell
Backto
Telophase
Glossary Mitotic spindle- specific group of spindle fibers used in the process of mitosis
Centrosomes- an organelle that serves as the main microtubule organizing center of the animal cell as well as a regulator of cell-cycle progression; each contains two centrioles
Centrioles- organelle that helps in cell division/ reproduction
Spindle Fibers- An aggregate of microtubules that move chromosomes during cell division
Kinetochore microtubules- spindle fibers that attach to the chromosome and maneuver the chromosome during mitosis
Nonkinetochore microtubules- spindle fibers that do not attach to the chromosome
Cytokenesis- the process in which the cytoplasm of a single eukaryotic cell is divided to form two daughter cells
Cleavage Furrow- the deep groove that forms when the cell membrane pinches inward in animal cells
Works Cited http://staff.jccc.net/PDECELL/celldivision/mitosis1.html
http://www.csun.edu/~lsh681/graphics/DIVISION.html
http://student.ccbcmd.edu/~gkaiser/biotutorials/dna/mitosis/images/metaphase1_pc.jpg
http://biology.about.com/od/mitosis/ig/Mitosis-Image-Gallery/Anaphase.htm
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