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Cell cycle for moodle
- 1. 10-2 Cell Cycle Page 245 Interphase – G 1 - cell grows, normal G 1 Phase functions of life – S Phase – DNA replicates M Phase – G 2 - cell grows and S Phase prepares for mitosis M Phase – Mitosis – Cell division G 2 Phase
- 2. Chromosomes In Interphase, chromosomes appearas chromatin When mitosis begins, chromatin condenses to form visible chromosomes Sister chromatids are identical halves of a duplicated chromosome • Chromatids are joined at the centromere
- 4. Mitosis - Prophase Chromosomescondense Nuclear membrane disappears Spindle fibers form as centrioles move toward poles
- 5. Mitosis - Metaphase Chromosomes line up along the cell’s center Chromosomes attach to spindle fibers at the centromeres
- 6. Mitosis - Anaphase Sister chromatids separate and move toward poles
- 7. Mitosis – Telophase and Cytokinesis Telophase – last step of mitosis – Individual chromosomes gather at poles – Nuclear membrane reforms Cytokinesis – follows telophase – Cell pinches in half – Two cells form • Animal Cells – cleavage furrow • Plant Cells – cell plate
- 8. Mitosis in Plant vs. Animal Cells No Centrioles centrioles Spindle Fibers Plant Cells Animal Cells Stages of mitosis Cell plate Cell (PMAT) pinches at forms between cleavage cells furrow
- 9. Another Look atMitosis Mitosis in a Lily Cell Onion Cells Mitosis in Whitefish Cells
- 10. Mitosis Review How manychromosomes did this cell start with? – FOUR During which phase are sister chromatids separated? – ANAPHASE How many chromosomes are in EACH daughter cell? – FOUR