Transcript The Cell Cycle - Ms. Porter's 7th Grade Science Class

The Cell Cycle
Tennessee State
Standards Addressed
• Grade 7
• GLE 0707.1.4 Illustrate how cell division
occurs in sequential stages to maintain
the chromosome number of a species.
• SPI 0707.1.4 Sequence a series of
diagrams that depict chromosome
movement during plant cell division.
Interphase
Cytokinesis
Mitosis
Click on a green box to learn more Take
about that stage of the cell cycle
Quiz
Interphase
• During Interphase, the
cell’s chromosomes
duplicate.
• This is the phase that
occurs BEFORE mitosis
begins.
• A period of Growth
Take
Quiz
• Mitosis is the part the
cell cycle in which the
NUCLEUS divides
• There are 4 phases of
Mitosis…
– Prophase
– Metaphase
– Anaphase
– Telophase
– Or…PMAT
Prophase
• Prophase is the FIRST
phase of Mitosis
• The nuclear membrane
has disappeared
• Chromosomes have
condensed and
shortened
• Centrioles move to
opposite ends of the cell
(in Animal cells ONLY)
• Plant cells do NOT have
Centrioles
Metaphase
• Metaphase is the
Second phase of Mitosis
• Chromatids line up in the
MIDDLE of the cell
• Spindle fibers attach to
the Centromeres
Anaphase
• Anaphase is the
THIRD phase of
Mitosis
• Each pair of
chromatids separate,
because the spindle
fibers begin to
shorten
• The separated
chromatids are now
called chromosomes
Telophase
• Telophase is the LAST phase of Mitosis
• TWO NEW NUCLEI form, but the two new cells
are still connected
• Spindle fibers start to disappear
• In plants, a cell plate forms between the two
new cells
Cytokinesis
• Cytokinesis occurs after the last phase of
Mitosis
• The CYTOPLASM separates and two new cells
form
• In plants, new Cell Membranes form from the
Cell Plate
Take
Quiz
Are you ready to TEST your
knowledge of the Cell Cycle?
Hmmmm….
The Cell
Cyle…..
Take the
Quiz!
Click the “Home” button if you
need to revisit the material
What is the first phase of
Mitosis?
Interphase
Prophase
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During which stage does
the Cytoplasm divide?
Cytokinesis
Telophase
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Which of the following is a picture
of Anaphase?
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Which structure do Animal
Cells have and Plant Cells
do NOT?
Centrioles
Cell Plate
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In which stage of Mitosis
do chromatids line up in
the middle of the cell?
Prophase
Metaphase
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Resources
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Resources
• Glencoe Science Tennessee Science Grade 7,
2010 McGraw-Hill
• http://www.sligotoday.ie/details.php?id=14134&
PHPSESSID=1c3cee1d50d35074c69b045b407
7b0fa
• med.mui.ac.ir
• phschool.com
• celldynamics.org