Cell Division
Upcoming SlideShare
Loading in...5
×
 

Cell Division

on

  • 1,847 views

 

Statistics

Views

Total Views
1,847
Views on SlideShare
1,438
Embed Views
409

Actions

Likes
0
Downloads
46
Comments
0

3 Embeds 409

http://tbarshinger.wikispaces.com 383
https://tbarshinger.wikispaces.com 23
http://www.slideshare.net 3

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Cell Division Cell Division Presentation Transcript

  • Cell Division
    • Mitosis & Meiosis
  • Why cells divide?
    • Replace old, damaged or dead cells
    • Growth of organism (multicellular)
    • Reproduce new organisms
  • Prokaryotic Cell Division
    • Binary Fission:
    Cell Grows Chromosome copies Cell Splits Into Two
  • Eukaryotic Cell Division
    • 2 kinds of cell division
      • Mitosis- Process in which 2 new cells with identical genetic material are made from the parent cell (1 diploid cell divides to produce 2 new diploid cells)
      • Meiosis- Process in which gametes (sex cells) are made in which they recieve half of the genetic information
  • Cell Cycle
    • Repeating events of life of a cell
    • Three events:
      • Interphase: cell growing (not dividing)
      • Mitosis or Meiosis: Genetic material dividing
      • Cytokinesis: Division of cell itself
  • Cell Cycle
  • Interphase
    • G1 phase
      • cell grows to mature size
    • S phase
      • Cell’s DNA copies
    • G2 phase
      • Cell prepares for cell division
    • G0 phase- cell no longer divides (nerve cells)
  • Interphase
  • Mitosis Division of chromosomes
    • 4 Events
      • P rophase
      • M etaphase
      • A naphase
      • T elophase
  • Prophase
    • Chromatin (DNA) shortens and tightens into distinct rod-shaped chromosomes
    • Nucleus & nucleolus disappear
    • Two pairs of centrioles migrate to each pole of the cell and release spindle fibers that radiate throughout the cell and attach to the centromere of each chromosome
  • Metaphase
    • Each chromosome lines up at the equator of the cell
  • Anaphase
    • •  Chromatids of each chromosome split and are pulled apart to opposite poles of the cell
  • Telophase
    • Chromosomes become less coiled and return to the less tightly coiled chromatin
    • Nucleus and nucleolus reappear in each new cell
    • Spindle fibers disappear
  • Cytokinesis
    • Cell & cytoplasm divide either by cleavage furrow in animal cells or cell plate in plant cells