1 / 31

MITOSIS

MITOSIS. What is the cell cycle?. Growth And Division. What is Mitosis?. Nuclear Division. What is Chromatin ?. ( Thin Chroma tin ) Stretched out, unwound DNA Looks like spaghetti Not visible under microscope. What is a Chromosome?.

tammy
Télécharger la présentation

MITOSIS

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. MITOSIS

  2. What is the cell cycle? Growth And Division

  3. What is Mitosis? Nuclear Division

  4. What is Chromatin? (Thin Chromatin) Stretched out, unwound DNA Looks like spaghetti Not visible under microscope

  5. What is a Chromosome? Coiled up (condensed) version of chromatin; easier for moving DNA (Looks like a slinky)

  6. What is the Centromere? Holds Sister Chromatids together Where spindle fibers grab chromosome (Think: Centro = center mere = middle)

  7. What is the Sister Chromatid? Two identical strands of a chromosome

  8. What are the Centrioles?

  9. Name the phases of the Cell Cycle… G1 Phase S Phase G2 Phase M Phase

  10. What happens in the G1 Phase? Growth Phase When cell gets bigger and makes lots of proteins 1st part of Interphase

  11. What happens in the S Phase? “Synthesis” Phase Makes a copy of the DNA Single strand →Double strand 2nd part of Interphase

  12. What happens in the G2 Phase? “Growth 2” Phase Cell is getting ready to divide Getting organelles and proteins (Like going to grocery store to get the food to prepare dinner) 3rd part of Interphase

  13. What happens in the M Phase? “Cell Division” Mitosis and Cytokinesis

  14. What is the“Cell Growth and Protein Synthesis” stage that is the longest phase of the Cell Cycle? (NOT part of Mitosis) Includes: G1, S, G2 Interphase

  15. Name the phases of Mitosis(Nuclear division) “The Professional MetAna on the Telophone.” Prophase Metaphase PMAT Anaphase Telophase

  16. When is the chromatin coiling (visible) under the microscope? (phase) Prophase

  17. Name each phase of Mitosis (not in correct order) Metaphase Anaphase Telophase Prophase

  18. What happens in Prophase? “Prepare” Longest phase of Mitosis!!! • Chromosomes coil up to make easy to move • Nuclear envelope (membrane) dissolves • Centrioles make spindle fibers Spindle fibers (muscles of chromosome) form to help move

  19. What happens in Metaphase? “Middle” Chromosomes are lined up in the middle of the cell Spindle fibers are attached and centrioles go to the poles

  20. What happens in Anaphase? “Apart” Chromosomes get pulled apart by spindle fibers

  21. What happens in Telophase? “The End” or “Tidy Up” Uncoiling of chromosomes Nuclear envelope reforms Spindle fibers go “bye-bye”

  22. What is Cell Cytoplasm & Membrane Division called? Actual cell division into two cells dividing into two daughter cells • Cytokenesis • This is part of Telophase. • Hint: cytoplasm • gets Kut

  23. Cytokenesis in Animal Cells What structure appears?

  24. Cytokenesis in Plant Cells What structure appears? Creates a CELL PLATE (Think: Hard cell wall is like a hard plate)

  25. What are the twonew identical cells made in cell division called? 1 cell divides into 2 new cells 2 Daughter Cells

  26. What is it called when a mass of cells are growing out of control? TUMOR

  27. What signals a cell to start the cell cycle? Cyclins

  28. Why do normal cells stop growing when they touch other cells or reach the sides of a petri dish? Contact with other cells or the sides of the dish signal to the cell to stop growing. This happens when you cut your finger. The cells grow rapidly to fill in the cut. When the cells touch, they go back to normal cell cycle.

  29. What are internal regulators and external regulators? Internal regulators are proteins that respond to events inside the cell to tell it when to go to the next phase of cell cycle. External regulators are proteins that respond to events outside the cell and tell the cell to speed up division then slow down to normal again.

  30. What is it called when cells have lost their ability to control their growth? Cancer

More Related