Mitosis & Meosis by 6Idl92i

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               Mitosis & Meosis

                    Cellular Division
               Mitosis
          46 chromosomes
• 2 daughter cells formed by one cell
  making copies of its chromosomes and
  dividing into 2 individual calls
     Mitosis occurs in 4 phases
•   P= Prophase
•   M= Metaphase
•   A= Anaphase
•   T= Telophase
Cleavage
furrow
Prophase- “thickening of chromosome”
 • Centrioles (or poles) appear and begin to
   move to opposite ends of cell
 • Spindle fibers form between the poles
Prophase

Centrioles



Spindle fibers
                     Metaphase
Chromatids (or pairs of chromosomes) attach to the spindle
fibers and align in middle of cell
• Chromatids (or pairs of chromosomes) attach
  to the spindle fibers.
                  Chromatids



                                       Centrioles




                                Spindle fibers
              Anaphase
• Chromatids (or pairs of chromosomes)
  separate and move to opposite ends of the
  cell
Chromatids-
             Telophase
• Two new nuclei form
• Chromosomes appear as chromatin
  (threads rather than rods)
• Mitosis ends
          nuclei
                              threads
            rods


Mitosis            Cleavage
                   Furrow
http://www.cellsalive.com/mitosis.htm
      Meiosis- SEX Cell production
           23 chromosomes
•   4 daughter cells- all unique
•   ½ of total amount of chromosomes
•   GAMETE cells
•   PMAT x2
              Homeostasis
• Equilibrium of cell
   Molecule Transportation

•Passive
•Facilitated
•Active
               Passive Transport
• High to low concentration. No energy
  required
  – Diffusion
  – Osmosis- diffusion of water


 Club Hansen
               Facilitated diffusion
• Molecules that must find a certain channel
  or pump to enter or exit the cell.




 Club Hansen
          Active Transport
• Requires energy to be added to occur
• Going low to high concentration


             Club Hansen

								
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