1 / 15

Chapter 10: Mitosis Cell Growth and Division

Chapter 10: Mitosis Cell Growth and Division. Cell Division. Cell Division – cell divides into two new IDENTICAL “daughter cells” Mitosis – division of nucleus during eukaryotic cell division Cytokinesis – division of cytoplasm during eukaryotic cell division. Cell Cycle. Interphase.

monicap
Download Presentation

Chapter 10: Mitosis Cell Growth and Division

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chapter 10:MitosisCell Growth and Division

  2. Cell Division • Cell Division – cell divides into two new IDENTICAL “daughter cells” • Mitosis – division of nucleus during eukaryotic cell division • Cytokinesis – division of cytoplasm during eukaryotic cell division

  3. Cell Cycle

  4. Interphase • Interphase • portion of cell cycle between divisions • ~ 75 – 80% life of cell • 3 phases: • G1: cells grow and develop • S: chromosomes replicate • G2: organelles required for division reproduce

  5. Chromosome • Chromosome • located in nucleus • contains DNA • Chromatid • half of chromosome that has been replicated • pair of “sister” chromatin • Centromere • area where each pair of chromatids attach (in center) CHROMOSOME sisterchromatid centromere sisterchromatid

  6. Mitosis Prophase  Metaphase  Anaphase  Telophase “Please Make Another Test” • 1. Prophase • doubling of chromosomes & organelles • centrioles visible • 2. Metaphase • chromosomes line-up in the middle • spindles from centrioles connect to each chromatid (half of chromosome) • 3. Anaphase • chromatids are pulled apart to separate ends • membrane begins to pinch off in the middle • 4. Telophase • Nucleus and nuclear envelope reform • Chromosomes decondense and disappear (you can no longer see them) • Cytokinesis - complete division of cytoplasm • two daughter cells formed

  7. Prophase • DNA condenses into chromosomes • Nuclear membrane begins to break down • - centrioles & chromosomes visible

  8. Metaphase • - chromosomes line-up in the middle • - spindles from centrioles connect to each chromatid • Spindle • microtubules that help separate chromosomes

  9. Anaphase • - chromatids are pulled apart to separate ends • - membrane begins to pinch off in the middle

  10. Telophase • Each set of chromosomes is positioned at each end of the cell • Chromosomes begin to uncoil & spindles far apart • - two daughter cells formed Cytokinesis - cells “pinch” off from one another - cytoplasm divides

  11. http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120073/bio14.swf::Mitosis%20and%20Cytokinesishttp://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120073/bio14.swf::Mitosis%20and%20Cytokinesis

  12. Regulating the Cell Cycle • Cyclins • Proteins that stimulate division during growth and repair (Interphase) • Internal regulators • respond to the events inside the cell • External regulators • speed up or slow down the cell cycle

  13. Cancer • Cancer = uncontrolled cell growth • do not respond to signals that regulate growth • causes: heredity, chemicals, radiation • Tumors = unregulated cell growth • Benign: cells stay together • Malignant: cells spread and grow elsewhere - invade healthy tissues

More Related