Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.
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Transcript of Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.
![Page 1: Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f525503460f94c757be/html5/thumbnails/1.jpg)
Rebekah HaLeah Shteynman Marlon Whitney
The Cell Cycle
![Page 2: Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f525503460f94c757be/html5/thumbnails/2.jpg)
• period between cell divisions
• eukaryotic cells spend most time in
• includes g1, S, g2
Interphase
![Page 3: Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f525503460f94c757be/html5/thumbnails/3.jpg)
• first phase of mitosis
• duplicated chromosomes condense
• causes nucleolus to disappear
• spindle microtubules form
• originate from centrioles
• new pair forms during interphase near previous pair
Prophase
![Page 4: Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f525503460f94c757be/html5/thumbnails/4.jpg)
• middle phase/stage
• 2 kinetochores pull toward opposite poles
• While microtubules lengthen/shorted until chromosome lines up along equator with 1 kinetochore facing each pole
• sister chromatids separate and are pulled to opposite poles of the cell
Metaphase
![Page 5: Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f525503460f94c757be/html5/thumbnails/5.jpg)
• another phase of mitosis, sister chromatids separate
• Allows each kinetochore move its chromosome pole ward, nibbling off end of attached microtubule
• Each pole has a copy of chromosome
• Polar microtubules grab one another overlapping at equator, lengthen + push on one another forcing poles of cell apart
Anaphase
![Page 6: Rebekah Ha Leah Shteynman Marlon Whitney The Cell Cycle.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f525503460f94c757be/html5/thumbnails/6.jpg)
• a nuclear envelope forms around each group of chromosomes
• end stage
• Spindle microtubules disintegrate, nuclear envelope forms around each group of chromosomes
• Those revert to extended state, nucleoli reform
Telophase