Cell Division

1
SECTION 10.2

• Cell Division

2
A) Cell Division in Prokaryotes

• Binary Fission division of a prokaryote cell
  into 2 identical offspring
• Chromosome are copied
• Cell enlarges
• Cell Membrane develops between the two
  chromosomes

3
Binary Fission
4
B) Cell Division in Eukaryotes

1. Mitosis cell replication to produce cells
   identical to the original
2. Meiosis production of gametes (egg/sperm cell),
   that contain half the organisms genetic info.

5
C) The Cell Cycle

• Cell Cycle life of a cell from its origin in the
  division of a parent cell until its own division
  into 2
• Interphase- preparation for Mitosis
• Mitosis- nuclear division
• Cytokinesis- cytoplasmic division

6
Cell Cycle
7
D) Interphase

• Interphase 3 steps that will prepare the cell
  for cell division
• a) G1 phase Growth of cell
• b) S phase DNA Replicated
• c) G2 phase Growth of cell
• d) G0 phase Dormant

8
Interphase
9
E) Mitosis

• Prophase
• Nuclear membrane disappears
• Replicated DNA coils into a chromosome
• Centrosomes move towards poles of cell
• Spindle Fiber extend

10
Prophase
11
E) Mitosis

• 2) Metaphase
• a) spindle fibers line chromosomes up in the
  center of the cell at metapheseal plate

12
E) Mitosis

• 3) Anaphase
• a) chromosomes separate equally and move toward
  poles of the cell

13
E) Mitosis

• 4) Telophase
• a) Spindle fibers break off
• b) chromosomes loosen to form chromatin
• c) Nuclear membrane forms around chromosomes

14
F) Cytokinesis

1. Division of the cytoplasm
2. Animal Cells cleavage furrow forms in btwn each
   set of nuclei
3. Plant Cells cell plate forms in btwn each set of
   nuclei

15
Cytokinesis