Download Mitosis is the process in which the nucleus divides to form two new

Asexual Reproduction
Mitosis
DSQ: Mitosis is the process in
which the nucleus divides to
form two new nuclei. How
does mitosis differ in plants and
animals?
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DSQ: Mitosis is the process in which the nucleus
divides to form two new nuclei. How does
mitosis differ in plants and animals?
DSQ: Mitosis is the process in which the nucleus
divides to form two new nuclei. How does
mitosis differ in plants and animals?
DSQ: Mitosis is the process in which the nucleus
divides to form two new nuclei. How does
mitosis differ in plants and animals?
DSQ: Mitosis is the process in which the nucleus
divides to form two new nuclei. How does
mitosis differ in plants and animals?
Asexual Reproduction
Mitosis
DSQ: Mitosis is the process in which the
nucleus divides to form two new nuclei.
How does mitosis differ in plants and
animals?
ANALYZE
(break apart, study the pieces)
There is a question within a question in this DSQ
Can you identify the question within the DSQ?
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Vocabulary Needed
Chromosomes- structures in the nucleus
that contain DNA
 DNA-deoxyribonucleic acid, is the
master copy of an organism’s
information code.
 Chromatin- hereditary material in a cell’s
nucleus, it coils into the form of
chromosomes when a cell divides
 Centromere-where the double stranded
chromosome is held together

How do little elephants grow up to be BIG
elephants?
The process of asexual
reproduction begins after a
sperm fertilizes an egg.
Skin cancer - the abnormal growth of
skin cells - most often develops on skin
exposed to the sun.
Cell that reproduce by asexual
reproduction reproduce constantly.
Animated Mitosis Cycle
http://www.cellsalive.com/mitosis.htm
• Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase & Cytokinesis
Chromosomes are copied (# doubles)
• Chromosomes appear as threadlike coils
(chromatin) at the start, but each chromosome
and its copy(sister chromosome) change to sister
chromatids at end of this phase
•
Nucleus
CELL
MEMBRANE
Cytoplasm
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
•
•


•
Mitosis begins (cell begins to divide)
Centrioles (or poles) appear and begin to move to
opposite end of the cell. (Only in animal cells).
Chromosomes become fully visible.
The nuclear membrane disappear
Spindle fibers form between the poles.(Only in
plants).
Centrioles
Sister chromatids
Spindle fibers
Animal Cell
Plant Cell
Spindle fibers
Centrioles
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
•
Chromatids (or pairs of chromosomes) attach
to the spindle fibers and line up across the
center of the cell.
Centrioles
Spindle fibers
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
•
Chromatids (or pairs of chromosomes)
separate and begin to move to opposite
ends of the cell.
Centrioles
Spindle fibers
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
•
•


•
Two new nuclei form.
Chromosomes appear as chromatin (threads rather
than rods) and become harder to see.
Centrioles and spindle fibers start to disappear.
A nuclear membrane starts to form around each group of
chromosomes.
Mitosis ends.
Nuclei
Chromatin
Nuclei
Animal Cell
Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
•
Cell membrane moves inward to create two
daughter cells – each with its own nucleus
with identical chromosomes.
Animal Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
Plant Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
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- Cell Division
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http://www.cellsalive.com/mitosis.htm