Transcript Slide 1

Created by: Deyra Suarez
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The process of mitosis is divided into six stages.
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Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Interphase
Prophase
Interphase
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G1
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Description
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S
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In this phase, the cell
increases in mass in
preparation for cell division.
The period during which DNA
is synthesized
G2
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The cell synthesizes proteins
and continues to increase in
size.
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The chromosomes are
identical chromatids
connected at the center
by the centromere.
Nucleolus disappears.
Centioles duplicate to
form two pairs of
centrioles.
Anaphase
Metaphase
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Metaphase can occupy a
large portion of the total
time of mitosis.
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End of Anaphase
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Each pole contains a
complete compilation of
chromosomes.
Cytokinesis
Telophase
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Description
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the re-forming of the nuclear
envelope
the sister chromatids reach
opposite poles
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Process
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With the two nuclei already at
opposite poles of the cell, the
cell cytoplasm separates.
The contractile ring defines
the cleavage line for the cell.
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Meiosis is a two-part cell division process in
organisms that sexually reproduce.
There are two phases.
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Meiosis I
Meiosis II
Phase I
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Interphase
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The cell undergoes a round of
chromosome replication.
Prophase
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Each replicated chromosome pairs
with its corresponding
homologous.
Metaphase
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Paired homologous chromosomes
line up at the center of the cell.
Anaphase
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Telophase
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Spindle fibers pull each
homologous chromosomes
pair toward opposite ends.
A nuclear membrane forms
around each cluster of
chromosomes.
Cytokinesis
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Forms two new cells.
Phase II
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Prophase
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The chromosomes each containing two chromatids become visible.
Metaphase II, Anaphase II, Telophase II, Cytokinesis
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The final four stages of meiosis II are similar to those in meiosis I.
However the result is four haploid daughter cells.
Four haploid
cells
Mitosis
Meiosis
Definition
A type of cellular
reproduction in which the
number of chromosomes
are reduced by half
through the separation of
homologous
chromosomes.
A process of asexual
reproduction in which the
cell divides in two
producing a replica.
Type of Reproduction
Sexual
Asexual
Function
Sexual Reproduction
Cellular Reproduction
Genetically
Different
Identical
Crossing Over
Yes
No
Chromosome Number:
Reduced by half
Remains the same
Number of Haploid
Daughter Cells Produced
4
2
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Cancer
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A disorder in which body cells lose the ability to control growth.
Cancer cells grow rapidly and need to copy their dna more quickly
than normal cells.
Cancer is a disease of the cell cycle.
Mutations
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Heritable changes in genetic information.
Cancer can result from mutations.
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Ex: Sickle Cell Disease.