370 likes | 473 Views
Mitosis. Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?. 1. Ready?. Begin!. 4:00. Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?. 3:00.
E N D
Mitosis Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild? 1
Ready? Begin!
4:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?
3:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?
2:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?
1:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?
CANCER In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. 8
Your life begins after a sperm fertilizes an egg, and you are smaller than a period in a newspaper.
Three reasons why cells reproduce by asexual reproduction: 1. Growth 2. Repair 3. Replacement
Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis
Interphaseoccurs before mitosis begins • Chromosomes are copied (# doubles) • Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANE Nucleus Cytoplasm
Interphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Prophase 1st step in Mitosis • Mitosis begins (cell begins to divide) • Centrioles(or poles) appear and begin to move to opposite end of the cell. • Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers
Prophase Plant Cell Animal Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Metaphase 2nd step in Mitosis • Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers
Metaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Anaphase 3rdstep in Mitosis • Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers
Anaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Telophase4th step in Mitosis • Two new nuclei form. • Chromosomes appear as chromatin (threads rather than rods). • Mitosis ends. Nuclei Nuclei Chromatin
Telophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Cytokinesisoccurs after mitosis • Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.
IPMATC REMEMBER! • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis IPayMoney AtThe Cashier
Smart Links Confused? Here are links to fun resources that further explain mitosis: • Mitosis Main Page on the Virtual Cell Biology Classroom ofScience Prof Online. • “Imitosis”music video by Andrew Bird. • DNA Replicationstep-through animation by John Kyrk. • Mitosis & Cytokinesisanimated video by McGraw-Hill. • Mitosis animation, step-through and quiz, Sadava, et al., Life: The Science of Biology, 9th Edition, Sinauer Associates. • Mitosisstep throughanimation from CellsAlive.com. • “That Spells DNA” song by Jonathan Coulton. (You must be in PPT slideshow view to click on links.) From the Virtual Cell Biology Classroom on ScienceProfOnline.com