6-2 NOTES:
MITOSIS AND
CELL CYCLE
DIVISION IN EUKARYOTES
Two types of Cell Division for
eukaryotes:
 Mitosis and Meiosis
MITOSIS
(DIVISION OF THE NUCLEUS)

Occurs in organisms undergoing growth,
development, and repair
 One cell division
 Makes 2 new cells identical to the original cell
 Makes somatic cells
 Makes diploid cell (2n)
MEIOSIS
Meiosis (gamete production) = Occurs
during the reproduction of gametes (sex cells)
Two cell divisions
makes 4 new cells with half the genetic
material of the original
 Makes sex cells
 Makes haploid cells (n)


CELL CYCLE
Cell Cycle = A
repeating cycle of
events in the life of a
cell
CELL CYCLE
Interphase = the period
between cell divisions (made
of 3 phases)
CELL CYCLE
Interphase = the period
between cell divisions (made
of 3 phases)
1) G1 = the growth phase, a
new cell grows to mature
size
2) S = DNA is copied or
synthesized to prepare for
division
3) G2 = the time when the
cell prepares for division
CELL CYCLE
Optional**) G0 = following G1 a cell can exit
the cell cycle and prevent further cell
division
• Ex/ Developed nerve cells enter G0 so nerve
cells can not divide to repair damage
MITOSIS PHASES
Mitosis divides the cell’s
nucleus in four phases.
1.
Prophase
2.
Metaphase
3.
Anaphase
4.
Telophase
MITOSIS PHASES
1. Prophase: Chromosomes condense,
nucleus breaks down, and spindle fibers
form
MITOSIS PHASES
2. Metaphase: Chromosomes line up in the
middle of the cell
MITOSIS PHASES
3. Anaphase: sister chromatids separate to
opposite sides of the cell.
MITOSIS PHASES
4. Telophase: The new nuclei form, spindle fibers
break down, and chromosomes begin to uncoil.
MITOSIS PHASES
Cytokinesis: division of the
cytoplasm
SEQUENCE OF CELL
CYCLE
G1 S  G2 M (Mitosis) C (Cytokinesis)
INTERPHASE CELL DIVISION
https://www.youtube.com/watch?v=aDAw2Zg4IgE
CELL CYCLE BRACE
MAP
CLASSWORK
Cell Cycle Drawing pg 155
• Draw and label each phase
Mitosis Flipbook use page 156
• Name each phase
• Draw and label cells at each cell
• Describe each phase