2. Mitosis
Mitosis is the process of cell division which
results in the production of two daughter cells
from a single parent cell. The daughter cells are
identical to one another and to the original parent
cell.
There are eight steps to Mitosis... Interphase,
Prophase, Prometaphase, Metaphase, Anaphase,
Telophase, Cytokinesis and back to Interphase.
This slideshow will go through the steps.
3. Interphase (End)
Nucleus
Nucleolus
Centrioles Cytoskeleton
This is the longest process of Mitosis where the
DNA replicates the centrioles divide, and proteins
are produced.
4.
5. Prophase
Chromosomes
The nucleolus fades and the replicated DNA and proteins
condense into Chromosomes. Each replicated chromosome
comprises into two chromotides, both with the same
genetic information. The microtubes in the cytoskeleton
then disassemble.
7. Prometaphase
In this stage the nucleus breaks down so it is no longer visible. Then the
mitotic spindle fibers elongate from the centrosomes and attach to
kinetochores, protein bundles at the centromere region on the
chromosomes where sister chromatids are joined. Other spindle fibers
then overlap each other at the cell center.
8.
9. Metaphase
Chromosomes
lining up.
Tension caused by the spindle fibers aligns all
chromosomes in one plane at the center of the cell.
10.
11. Anaphase
Spindle fibers shorten, the kinetochores separate, and the
chromatids (daughter chromosomes) are pulled apart and
begin moving to the cell poles.
15. Cytokinesis
The spindle fibers not attached to chromosomes begin breaking
down until only that portion of overlap is left. It is in this region
that a contractile ring cleaves the cell into two daughter cells.
Microtubules then reorganize into a new cytoskeleton for the
return to interphase.
