1 / 16

Understanding Cell Division Cycle: Mitosis & Meiosis Process in Eukaryotes

Learn about cell division in prokaryotes and eukaryotes, the cell cycle phases, including mitosis and meiosis processes, key events like cytokinesis, and detailed phases like prophase, metaphase, anaphase, and telophase.

barbaraf
Download Presentation

Understanding Cell Division Cycle: Mitosis & Meiosis Process in Eukaryotes

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. Cell Division Section 8.2

  2. All cells are derived from the division of pre-existing cells • Cell division is the process by which cells produce offspring cells

  3. Cell division in Prokaryotes • Binary fission- the division of a prokaryotic cell into 2 offspring cells

  4. Cell division in Eukaryotes • Mitosis- results in new cells with genetic material that is identical to that of the original cell • Meiosis- reduces the chromosome number by half in new cells

  5. The cell cycle • The repeating set of events that make up the life of a cell • Interphase- the time between cell divisions • M phase- mitosis • Cytokinesis- the division of the cytoplasm of the cell

  6. Interphase • G1 phase-offspring cells grow to mature size • S phase- the cell’s DNA is copied • G2 phase- the time gap following the S phase and preceding cell division • G0 phase- cells do not copy their DNA and don’t prepare for cell division

  7. Mitosis • Divided into 4 phases: prophase, metaphase, anaphase, and telophase

  8. Prophase • First phase of mitosis • Centrosomes- appear next to the disappearing nucleus • Centrioles- found in animal cells

  9. Spindle fibers- made of microtubles radiate from the centrosomes in preparation for mitosis • Mitotic spindle- equally divides the chromatids between the 2 offspring cells

  10. Kinetochore fibers- attach to kinetochore • Kinetochore- disk-shaped protein • Polar fibers- extend across the dividing cell from centrosome to centrosome

  11. Metaphase • Second phase of mitosis • The kinetochore fibers move the chromosomes to the center of the dividing cell

  12. Anaphase • Third stage of mitosis • Chromatids of each chromosome separate at the centomere

  13. Telophase • Fourth stage of mitosis • Spindle fibers disassemble • Chromosomes return to a less tightly coiled chromatin state

  14. Cytokinesis • Cleavage furrow- pinches the cell into 2 cells (animal cells) Cell plate- membrane-bound cell wall (plant cells)

More Related