1 / 21

The Cell Cycle

The cell cycle is a crucial process for cell organization, involving the transition from cells to tissues, organs, organ systems, and organisms. This cycle comprises three main stages: Interphase, Mitosis, and Cytokinesis. During Interphase (G1, S, G2), cells grow, duplicate organelles, and synthesize DNA. Mitosis is the process of nuclear division, encompassing four phases: Prophase, Metaphase, Anaphase, and Telophase. Cytokinesis follows, dividing the cytoplasm and forming two identical daughter cells. Understanding these phases is essential for grasping cellular reproduction and organization.

gabriel-puckett
Télécharger la présentation

The Cell Cycle

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. The Cell Cycle

  2. Order of cell organization……… Cell  Tissue  Organ  Organ System  Organism **Cells must divide and create many cells in order for this process to occur

  3. The Cell Cycle  Interphase, Mitosis and Cytokinesis Interphase (G1, S and G2) G1 – (Organelles Duplicate) S – DNA synthesizes (also called duplicates or replicates) G2 – (Cell prepares to divide)

  4. The Cell Cycle**Interphase Organelles replicate, DNA synthesizes and cell prepares to divide** Mitosisis Asexual Reproduction Divides Nucleus**Cytokinesis Divides Cytoplasm

  5. Interphase – Prepares for Mitosis ** Majority of time for a cell is in this phase ** Cell grows ** Organelles duplicated (G1) **DNA synthesizes (S) ** Only chromatin (uncoiled chromosomes) visible

  6. Chromosomes Duplicate In the S Phase of Interphase • Carriers of genes • Some genes carry the “instructions” for protein production • Remember, chromosomes are duplicated during the S phase of Interphase prior to mitosis! • You have 46 total chromosomes in the nucleus of most of your cells!!

  7. **Nuclear Division Called Mitosis

  8. After Interphase **Four phases of mitosis (cell division) are: **Prophase **Metaphase **Anaphase **Telophase **Recall Mitosis Divides the nucleus, Cytokinesis Divides the Cytoplasm

  9. Prophase ** Duplicated chromosomes become visible ** A spindle, football shape structure that contains many fibers, moves to opposite poles

  10. Metaphase **Chromosomes line up in the MIDDLE of the cell ) its equator) **Each chromatid is attached to a separate spindle fiber by its centromere (in the middle!!)

  11. Anaphase ** Centromeres split pulling apart sister chromatids. ** Chromatids move to opposite poles

  12. Telophase Animal Cell ** Chromosomes uncoil back into chromatin ** Two nuclei appear ** In animals a cleavage furrow forms (plants have a cell plate) ** In plants a cell plate forms between the 2 cells

  13. Cytokinesis – Division of Cytoplasm ** Two new identical daughter cells after

  14. Mitosis at a Glance– Cell Division

  15. Cytokinesis in an Animal Cell ONLY in animal cells

  16. Cytokinesisin a Plant Cell Only in Plants Only in Plants

  17. Onion Root Tip – Can You Find the Stages of Mitosis

  18. Mitosis in Real Time

  19. Modeling Mitosis

  20. Really Cool Animation

  21. Cell Cycle in Prokaryotes (Bacteria) **NO TRUE NUCLEUS!!! DNA replicates and the plasma membrane just pinches inward to form two new cells.

More Related