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

cells equator without attaching to chromosomesPICTURE

S DIAGRAM

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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

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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

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Telophase

Daughter nuclei begins to form at the two poles Nucleoli reappear and chromatin fiber becomes

less tightly coiled Two identical daughter cells follows shortly after

mitosis with cytokenesis

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PICTURES

DIAGRAM

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Animal cell

Plant cell

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Prophase

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Animal cell

Plant cell

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Metaphase

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Plant cell

Animal cell

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Anaphase

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Plant cell

Animal cell

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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

Spindle Fibers- An aggregate of microtubules that move chromosomes during cell division.

Kinetochores- the protein structure on chromosomes where the spindle fibers attach during division to pull the chromosomes apart

Centromeres- a region of DNA typically found near the middle of a chromosome where two identical sister chromatids come in contact. It is involved in cell division as the point of mitotic spindle.

Cytokenesis- the process in which the cytoplasm of a single eukaryotic cell is divided to form two daughter 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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