Download Notes: Mitosis and Cell Cycle

SCIENCE STARTER #3 – 12/14/16
Correctly categorize the following words into
(1) somatic or (2) gametes.
Haploid
Diploid
2n
1n
Body cell
Sex cell
1 set of
chromosomes
2 set of
chromosomes
Formed by
meiosis
Formed by
mitosis
CELL DIVISION PREVIEW DUE TOMORROW (THURSDAY)
NOTES 6.2:
MITOSIS AND
CELL CYCLE
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
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
Results in two identical
daughter cells
SEQUENCE OF CELL
CYCLE
G1 S  G2 M (Mitosis) C (Cytokinesis)
INTERPHASE CELL DIVISION
CLASSWORK
COVER: Cell Cycle
NAME
PERIOD
use page 156 and your notes
• Name each phase
• Draw and label cells at each stage
•
•
•
•
•
•
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
• Describe each phase
• What are some of the main events occurring in the phase?