Cell Division And Reproduction

1. Cell Division and Cell Division and
ReproductionReproduction

2. Cell DivisionCell Division
The process in which The process in which
a cell, called a parent a cell, called a parent
cell divides and cell divides and
produces new cells, produces new cells,
called daughter cells.called daughter cells.
The primary concern The primary concern
of cell division is the of cell division is the
maintenance of the maintenance of the
original cell's Genome original cell's Genome
(genes). (genes).

3. Binary FissionBinary Fission
Prokaryotic cells use the Prokaryotic cells use the
process of Binary Fission.process of Binary Fission.
There are only three steps There are only three steps
in this processin this process
1: Copy DNA1: Copy DNA
2: Separate DNA2: Separate DNA
3: Divide Cell3: Divide Cell
Each new cell receives an Each new cell receives an
identical copy of genes.identical copy of genes.

4. Organization of DNAOrganization of DNA
Before replication Before replication
DNA is organized DNA is organized
into Chromosomes.into Chromosomes.
Chromatid - one of Chromatid - one of
the two identical the two identical
parts of the parts of the
chromosome. Called chromosome. Called
“sisters”.“sisters”.
Centromere - Point Centromere - Point
of attachment.of attachment.

6. MitosisMitosis

7. MitosisMitosis
The process in which a cell copies it’s The process in which a cell copies it’s
DNA and divides to create two new DNA and divides to create two new
daughter cells.daughter cells.
Also called Eukaryotic cell division.Also called Eukaryotic cell division.
Why perform Mitosis? When is it used?Why perform Mitosis? When is it used?
To create new cellsTo create new cells
To replace damaged or old cellsTo replace damaged or old cells
GrowthGrowth

8. The phases of MitosisThe phases of Mitosis
IPMATIPMAT
InterphaseInterphase
ProphaseProphase
MetaphaseMetaphase
AnaphaseAnaphase
TelophaseTelophase

9. InterphaseInterphase
The normal cell life The normal cell life
cycle includes periods cycle includes periods
of replication and a of replication and a
resting stage.resting stage.
The cell prepares for The cell prepares for
division by replicating division by replicating
DNA. DNA.

10. ProphaseProphase
The first phase of The first phase of
actual mitosis.actual mitosis.
DNA condenses into DNA condenses into
chromosomes from chromosomes from
chromatin.chromatin.
Centrosomes start Centrosomes start
assembling assembling
microtubules, these microtubules, these
are called spindle are called spindle
fibers. fibers.

11. MetaphaseMetaphase
Chromosomes line up Chromosomes line up
along the metaphase along the metaphase
plate.plate.
The spindle fibers The spindle fibers
attach to the attach to the
centromeres of the centromeres of the
chromosomes.chromosomes.

12. AnaphaseAnaphase
Spindle fibers begin Spindle fibers begin
to pull chromosomes to pull chromosomes
to opposite ends of to opposite ends of
the cell.the cell.
In the process, the In the process, the
chromosomes are chromosomes are
ripped apart, ripped apart,
separating the sisters. separating the sisters.

13. TelophaseTelophase
Clean up phase.Clean up phase.
Nuclear membranes Nuclear membranes
begin to reform.begin to reform.
Chromatids unwind.Chromatids unwind.
Cell begins to divide Cell begins to divide
in two.in two.

14. CytokinesisCytokinesis
The final stage in the mitotic cycle. The final stage in the mitotic cycle.
It is when the cell splits in two.It is when the cell splits in two.
All organelles are equally distributed All organelles are equally distributed
between the two daughters.between the two daughters.
Finally two new identical cells are created. Finally two new identical cells are created.

15. Cells AliveCells Alive
Mitosis Interactive WebsiteMitosis Interactive Website