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Do Now What organic molecule is DNA made of? Which organelle is DNA found in a cell? DNA is wrapped up in to which structure in the organelle (mentioned above) Cell Division: Mitosis Basic Animal Genetics, ANR.C.C7.5 https://www.youtube.com/watch?v=HYKes I9jL8c Objective: Understand the purpose of mitosis Understand the process of mitosis Explain the sequence and events of each phase Review: What are the two types of cells? Eukaryotic Prokaryotic What are prokaryotic cells? Simple cells Few internal structures No membrane bound organelles One-celled organisms, Bacteria Examples of prokaryotic cell: Bacteria Cells What are eukaryotic cells? Cells that contain organelles surrounded by membranes Most living organisms Examples of eukaryotic cells: Plant Animal Human Cells Cells Cells Plant Cell Animal Cell (Tomato) (tiger) How do prokaryotic cells divide? Binary Fission (A fancy name that scientists use to impress their girlfriends or boyfriends. A process where one prokaryotic cell becomes two.) How do eukaryotic cells divide? Mitosis! What is mitosis? (How eukaryotic cells divide.) A continuous process of four phases that results in the division of the nucleus. Making more cells! Why do we care? Once upon a time we were all one little cell. Because of mitosis we are now made of trillions of cells. This applies to animals too! https://www.youtube.com/ watch?v=m73i1Zk8EA0 Made possible, in part by: MITOSIS Made possible, in part by: MITOSIS Made possible, in part by: MITOSIS You get the idea… The Phases of Mitosis The 4 Phases of Mitosis: Prophase Metaphase Anaphase Telophase What about Interphase? Interphase is the resting period between cell division. Why do we study diagrams first? Easy to identify structures Clear Simple Why do should we view microscopic images also? To see the real deal! To reveal greater complexities. Interphase diagram microscopic image Are the cells really pink and purple? Nope, they are stained so that we can see the organelles better. Prophase diagram microscopic image Prophase Formation of chromosomes from chromatic Nuclear membrane dissolves Metaphase diagram microscopic image Metaphase Chromosomes line up in the middle of the cell Anaphase diagram microscopic image anaphase The chromosome pairs separate and each one goes to a different end of the cell Telophase diagram microscopic image telophase 2 new nuclei are formed! SAME exact genetic information in each of the cells. cytokinesis Cytoplasm divides and 2 new cells are formed!! Mitosis: 1 cell 2 cells with the same DNA https://www.youtube.com/ watch?v=m73i1Zk8EA0 Mitosis song https://www.you tube.com/watch ?v=HYKesI9jL8c http://scienceclass.net/Lessons/Cells/Cell %20Division/Phases%20of% 20Mitosis.pdf They all look like blobs… how can we tell them apart? What’s happening in each phase?
