mitosis
TRANSCRIPT
Cell Reproduction:
MitosisPrepared by: Mr. Russel F. Deleña
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Cell Reproduction: Mitosis
Suppose you are having a cupcake business and
one time your stock runs low having 24 pieces of
cupcakes left. There is a customer that orders 3
dozens of cupcakes, how will you attend to your
problem of having low number of cupcakes?2
Cell Reproduction: Mitosis
THE CELL
CYCLE
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Cell Reproduction: Mitosis
• The cell initially grows.
• Preparation for the next stage of the cell cycle.
• Characterized by protein and ribonucleic acid (RNA) synthesis.
G1
S
• The period of DNA synthesis or replication.
• The chromosomes are duplicated in preparation for the next cell division
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Cell Reproduction: Mitosis
• Represents a period of rapid cell growth to prepare for cell division.
• Two centrosomes appear in the cytoplasm.
G2
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MITOSIS
MEIOSIS
Cell Reproduction: Mitosis
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Pro-phase
Prome-taphase
Meta-phase
Ana-phase
Telo-phase and
Cytoki-nesis
Cell Reproduction: Mitosis
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• The nuclear membrane and
nucleoli may still be present.
• The chromosomes are thicker
and shorter because of repeated
coiling.
• At this stage, each chromosome
is made up of two identical
sister chromatids.
• The two chromatids produced
from one chromosome are still
attached at one point
PROPHASE
Cell Reproduction: Mitosis
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• The nuclear membrane has
disappeared while the highly
coiled chromosomes align at the
metaphase plate.
• Spindle fibers are also formed.
Each fiber binds to a protein
called the kinetochore at the
centromere of each sister
chromatid of the chromosome.
METAPHASE
Cell Reproduction: Mitosis
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• The paired centromeres of each
chromosome separate towards
the opposite poles of the cells
as they are pulled by the spindle
fibers through their
kinetochores.
ANAPHASE
Cell Reproduction: Mitosis
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• The chromosomes are now at
the opposite poles of the
spindle. They start to uncoil and
become indistinct under the
light microscope.
• A new nuclear membrane forms
around them while the spindle
fibers disappear.
TELOPHASE
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The BIGquestion
Cell Reproduction: Mitosis
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CANCER
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CANCER• Uncontrolled cell division
due to DNA mutations
Mutations may be caused by:
1. radiation2. smoking3. Pollutants4. chemicals 5. viruses
Cell Reproduction: Mitosis
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What does cancer
looks like??
Cell Reproduction: Mitosis
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What does cancer
looks like??
Cell Reproduction: Mitosis
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What does cancer
looks like??
Cell Reproduction: Mitosis
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Now, DO YOU WANT
to have CANCER?
Do you believe that healthy living
can prevent uncontrolled cell
division or cancer?
Cell Reproduction: Mitosis
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3- Give concepts you learned today.
2- Give two ways in which you can use these
concepts in daily living
1- Question you want to ask
Cell Reproduction: Mitosis
The button are hyperlinks to videos. If you wish to know what are the videos, feel free to message me at my FB account (Russel Flores Deleña) so that I can send you the link for the videos used in this presentation.
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