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The Four Stages of Mitosis

The Four Stages of Mitosis. By: Bobby Naugle Sophie Terry Krista Pipan. Prophase. Mitosis. Telophase. Metaphase. Anaphase. Prophase. Means in Ancient Greek “before stage” Chromatin condenses into a structure called chromosome which is called Chromatin condensation

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The Four Stages of Mitosis

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  1. The Four Stages of Mitosis By: Bobby Naugle Sophie Terry Krista Pipan

  2. Prophase Mitosis Telophase Metaphase Anaphase

  3. Prophase • Means in Ancient Greek “before stage” • Chromatin condenses into a structure called chromosome which is called Chromatin condensation • Sister chromatids are attached to each other at the centromere • The centrosomes move away from each other, apparently propelled by the lengthening microtubules between them • The nuclear envelope breaks down and microtubules of the spindle fibercan now invade the nuclear area and interact with the chromosomes, which have become more dense • Each of the two chromatids of a chromosome now has a kinetochore • “Kinetochore Microtubules” jerk the chromosomes back and forth • Nonkinetochore microtubules interact with those from the opposite pole of the spindle SWEET PICS

  4. Prophase Animal plant

  5. Metaphase • In Greek it means “between stage” • The longest stage of mitosis , lasting about 20 minutes. • The centrosomes are now at the opposite ends of the cell • The chromosomes are located in the middle of the cell on the metaphase plate where they are equidistant from the chromosomes on each end of the cell SWEET PICS

  6. Metaphase animal plant

  7. Anaphase • In Greek means “up stage” • The shortest of the stages, lasting only a few minutes • The sister chromatids of each pair suddenly part, making each chromatid a chromosome • As kinetochore microtubules shorten the chromosomes are pulled to opposite ends of the cell • The cell elongates as the nonkinetochore microtubules lengthen • As anaphase ends the two ends of the cell have equivalent and complete collections of chromosomes SWEET PICS

  8. Anaphase Animal plant

  9. Telophase • Two daughter nuclei begin to form in the cell • The nuclear envelopes arise from the fragments of the parent cell’s nuclear envelope and other portions of the endomembrane system • The chromosomes become less condensed • Mitosis is complete SWEET PICS

  10. Telophase animal plant

  11. Glossary Centrosomes- small region of cytoplasm adjacent to the nucleus that contains the contrioles and serves to organize microtubules Endomembrane system – composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell Kinetochores – protein structure on chromosomes where the spindle fibers attach during division to pull the chromosomes apart Metaphase plate – plane of the equator of the spindle into the which chromosomes are positioned during metaphase Spindle fibers – microtubules that move chromosomes during cell division

  12. Works Cited http://www.bioweb.uncc.edu/1110Lab/notes/notes1/labpics/lab6pics.htm http://www.accd.edu/sac/biology/MrT/06web3/CH12.html http://www.biology.iupui.edu/biocourses/N100/2k2ch8mitosis.html http://biog-101-104.bio.cornell.edu/biog101_104/tutorials/cell_division/onion_review_fs.html

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