Download Cell Division: Mitosis

The Cell Cycle
Cell division: Mitosis
The Cell Cycle
The regular sequence of growth and division that
cells undergo is known as the cell cycle.
During the cell cycle, a cell grows, prepares for
division, and divides into two new cells, called
“daughter cells”. Each of the “daughter cells”
begins the cell cycle again.
The cell cycle occurs in 3 stages:
- interphase
- mitosis (this stage is divided into 4 phases)
- cytokinesis
Cell Division & Mitosis. Retrieved March 6, 2007, from Biology 4A
Student Resources Web site:
http://www.biologycorner.com/bio4/notes/mitosis.php
The Cell Cycle
Cell division
occurs in
three stages:
interphase,
mitosis, and
cytokinesis.
Cell Division & Mitosis. Retrieved March 6, 2007, from Biology 4A
Student Resources Web site:
http://www.biologycorner.com/bio4/notes/mitosis.php
Cell Division Classification
Stage
Name
Process
1
Interphase
Cell doubles in size; DNA replicates; cell
prepares to divide; centrioles are copied
2
i.
Mitosis
Cell division goes through 4 phases
(PMAT)
Prophase
Mitosis begins; nuclear membrane disappears;
chromatin condenses to form chromosomes
ii. Metaphase
Chromosomes line up along the
equator of the cell
iii.
Anaphase
iv.
3
Telophase
Chromatids split and are pulled to
each pole of cell
Nuclear membrane reforms; cell
begins to pinch together
Cytokinesis
Parent cell’s cytoplasm divides,
forming 2 identical daughter cells
Stage 1: Interphase
1. Cell grows to its full
size; produces
structures necessary
for cell division
2. DNA makes a copy of
itself (DNA
Replication)
3. Prepares for cell
division; two
cylindrical structures
called centrioles are
also copied.
Stage 2: Mitosis
Mitosis is subdivided into four phases.
Cell Division & Mitosis. Retrieved March 6, 2007, from Biology 4A Student Resources Web site:
http://www.biologycorner.com/bio4/notes/mitosis.php
Phase 1: Prophase
1. Mitosis begins
2. Chromatin in the
nucleus condenses
to form
chromosomes
3. The pairs of centrioles
move to opposite sides
of the nucleus
4. Spindle fibers form a
bridge between ends of
the cell
5. The nuclear membrane
breaks down
Phase 2: Metaphase
1. Chromosomes line up
along the
equator/center of the
cell.
2. Each chromosome
attaches to a spindle
fiber at its centromere
(middle)
Phase 3: Anaphase
1. The centromeres split
2. The two chromatids
separate, and each
chromatid becomes a
new chromosome
3. The new
chromosomes move to
opposite ends of the
cell
4. The cell stretches out
as the opposite ends
are pushed apart
Phase 4: Telophase
1. The chromosomes
begin to stretch out
and lose their rod-like
appearance
2. A new nuclear
membrane begins to
form around each
region of
chromosomes
Stage 3: Cytokinesis
1. The cell membrane pinches
in around the middle of the
cell
2. The cell splits in two
3. Each daughter cell ends up
with an identical set of
chromosomes and about
half of the organelles
4. After cytokinesis is
complete, each new cell
enters interphase and the
cycle begins again
Mitosis Animations
1. Basic mitosis animation.
2. Cells Alive
3. Simple Animal Cell
4. The Biology Project
(Use the QuickTime version @ bottom of site.)
5. Cell Division Bio-Clip (This is the best one!)
6. Mitosis Animation & Quiz (Self-paced)
7. Narrated animation & quiz (Self-paced)