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The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
The cell cycle presentation teacher version 08
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The cell cycle presentation teacher version 08

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Transcript

  • 1. The Cell Cycle
  • 2. Here is what we’re going to learn about. CELL DIVISION PARENT CELL 2 DAUGHTER CELLS
  • 3. The Stages of the Cell Cycle STAGE 1: Interphase CELL GETS READY STAGE 2: Mitosis NUCLEUS DIVIDES Prophase Metaphase Anaphase Telophase CELL MEMBRANE STAGE 3: Cytokinesis DIVIDES
  • 4. Phase 1: Growing • The cell GROWS to its full size and produces the structures it needs. • The cell may make new ribosomes and enzymes and copies are made of mitochondria. THE CELL LOOKS AND ACTS PRETTY NORMAL IN THIS PHASE
  • 5. INTERPHASE - Growing
  • 6. • Cell grows to its normal size • Cell makes a copy of its DNA (DNA REPLICATION) • 2 Centrioles are copied to make a total of 4 INTERPHASE
  • 7. CENTRIOLE
  • 8. Phase 2: Copying DNA • The cell makes an exact copy of the DNA in its nucleus. This process is called DNA REPLICATION. • Important step, because the new cells (daughter cells) must have an exact copy of the first cell’s (parent cell) DNA. • After the Copying DNA Phase, 2 identical sets of DNA are in the parent cell.
  • 9. Phase 2: Copying DNA (occurs inside nucleus) ORIGINAL ORIGINAL COPY
  • 10. What is Stage 2: Mitosis? This is the 2nd Stage of the Cell Cycle. • This is the stage during which the cell’s nucleus divides into 2 new Nuclei. During mitosis, 1 copy of the parent’s DNA is made for each of the 2 daughter cells. • There are 4 phases in Mitosis: prophase, metaphase, anaphase, and telophase.
  • 11. MITOSIS:PROPHASE
  • 12. • Chromatin shrinks to make Chromosomes • Spindle fibers are formed • Membrane around nucleus breaks down MITOSIS: PROPHASE
  • 13. CHROMOSOME • Made up of 2 chromatids held together by a centromere. • Chromatids are made of DNA.
  • 14. MITOSIS: METAPHASE
  • 15. • Chromosomes line up in middle of cell • Spindle fibers grab onto centromeres of chromosomes MITOSIS: METAPHASE
  • 16. MITOSIS: ANAPHASE
  • 17. • Centromeres split • Spindle fibers pull chromatids to either side of cell (CYTOKINESIS BEGINS: cell stretches out) MITOSIS: ANAPHASE
  • 18. MITOSIS: TELOPHASE
  • 19. • Chromosomes stretch out and begin to turn back into chromatin • Nuclei reform (CYTOKINESIS CONTINUES: cell pinches in the middle) MITOSIS: TELOPHASE
  • 20. Phase 3: Preparing for Division • The cell gets ready to divide. • The cell produces structures that it will use to divide into new cells. • The cell makes a copy of its 2 centrioles, to now have 4 of them. • Once this step is over, the cell is ready to divide.
  • 21. Cytokinesis in an Animal Cell BEFORE DURING AFTER
  • 22. • Each daughter cell is given equal organelles and 1 nucleus. • Cell membrane splits, forming 2 new daughter cells. ANIMAL CELL: CYTOKINESIS
  • 23. Cytokinesis in Plant Cells
  • 24. • A cell plate forms in the middle of the cell. • The cell plate turns into a cell membrane that cuts the cell into 2 daughter cells. • New cell walls then form around each of the daughter cells to protect them.. PLANT CELL: CYTOKINESIS
  • 25. How long do the 3 stages take? HUMAN LIVER CELL HOW LONG DOES THE WHOLE THING TAKE?

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