Transcript Cell Cycle & Mitosis

Cell Cycle & Mitosis
Cell Cycle & Mitosis
What type of cell
does mitosis?
Eukaryote,
Prokaryote, or Both
only eukaryotic cells
do mitosis
Cell Cycle & Mitosis
What happens when
a unicellular
eukaryote completes
mitosis?
In unicellular
organisms Mitosis
makes a new
organism
Does a new organism
form through mitosis
of a eukaryotic
multicellular
organism?
No, a multicellular
eukaryotic organism
does not make a new
organism through
mitosis.
Cell Cycle & Mitosis
Then for what does a
eukaryotic
multicellular organism
use mitosis?
Cell Cycle & Mitosis
Instead a multicellular
eukaryotic organism
uses mitosis for
repair, growth, and
development
.
Cell Cycle & Mitosis
Do bacteria use
mitosis to make new
organisms?
mitosis at all because
bacteria have only
one chromosome
attached to a cell
membrane and use
fission to create more
bacteria.
Cell Cycle
http://schoolworkhelp
er.net/2010/11/cellcycles-interphasemitosis-cytokinesis/
Interphase
not really mitosis
premitosis
• Interphase (before mitosis but often
mistakenly put as part of mitosis)
• G1 + S + G2 = Cell grows, makes
more cytoplasm and organelles
duplicate, copies DNA, and gets
ready to divide
Mitosis starts with
Prophase
• Remember Please Make Another Taco
• Prophase, Metaphase, Anaphase,
Telophase
Prophase
• Chromosomes pack up
• Centrioles go to opposite sides of cell
• Spindle fibers reach from centrioles to
chromosomes
• Nuclear membrane falls apart
• Remember packed up the centrioles
moved and spin a nuclear fall apart like
a little military event
Metaphase
• During late prophase or into metaphase
chromatids move to center are of cell
• remember
• At metaphase the chromatids met in the
middle chromatids are aligned
Anaphase
• Chromatids move apart, toward
opposite poles
• remember
• Sister Anna moved to the opposite side
•
Telophase
Chromosomes are at opposite parts of the
cell
• nuclear membranes reforms around each
set of chromosomes
• chromosomes uncoil
• spindle fibers fall apart
• Remember telo like telecommunications so
wires uncoil, fiber optics, at the end of any
war you must rebuild so we started with
membrane falling apart now it rebuilds
Watch
• MITOSIS
• VIDEO OF MITOSIS IN AN ANIMAL
CELL SHOWING ALL PHASES
• http://bio.rutgers.edu/~gb101/lab2_mito
sis/graphics/aavideo.mov
•
•
Watch
• ON AN ONION ROOT IDENTIFY ALL
PHASES OF MITOSIS IPMAT
• http://bio.rutgers.edu/~gb101/lab2_mito
sis/section2_frames.html
Watch
• ON AN ANIMAL CELL IDENTIFY ALL
PHASES OF MITOSIS
• http://bio.rutgers.edu/~gb101/lab2_mito
sis/section2_frames.html
Mitosis ends here
and cytokinesis is
separate
Cyto indicating a cell as in cytoplasm
Kinesis as in movement after a stimuli
Therefore
Cytokinesis is…….
Cytokinesis
• Cytokinesis = splitting of the
cytoplasm
• Not an actual phase of mitosis.
• The division of cytoplasm after
separation of the chromosomes
• In plant cells, a new cell wall forms to
divide the two daughter cells (CELL
PLATE)
Interactive mitosis
• http://esminfo.prenhall.com/science/Biol
ogyArchive/audesirk/closerlook/mitosis.
html