Transcript New animal cells are created during the cell cycle.

(1.2) Cell Division - Mitosis
(p28-31)
Cell Cycle
In the cell cycle, a precise sequence of events
leads to the creation of new cells. The events
are:
• Interphase
• Mitosis (including prophase, metaphase,
anaphase, and telophase)
• Cytokinesis
Creating New Cells- the steps
Page p29
Figure 1.10
Creating New Cells- the steps
Remember the
steps!
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
I Prefer Mice And Talking Cats
New animal cells are created during
the cell cycle.
The nucleolus, is a structure
composed of proteins and
nucleic acids found within the
nucleus.
Chromatin condenses to form
chromosomes.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during
the cell cycle.
Replicated chromosomes are also
called sister chromatids.
In animal cells, a pair of organelles
called centrioles move to each
end of the cell, forming poles of
the miotic spindle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during
the cell cycle.
Each chromosome is connected
to a the spindle fibre at its
centromere.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during
the cell cycle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during
the cell cycle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during
the cell cycle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
Cell Cycle Diagrams
• Interphase
• Prophase
• Metaphase
MITOSIS
• Anaphase
• Telephase
• Cytokinesis
Mitosis
Diagrams & Images
Cell Division – Uncontrolled!
• If a cell ignores a signal to stop dividing,
unchecked cell growth can result. Over time,
the newly divided cells form a mass called a
tumour.
• A mutation (a permanent change in a cell’s
DNA) is what causes the cells to ignore the
“stop” signals.
• Cancer cells differ from normal cells in shape,
size, and content.
Cancer Cells
• Benign tumour
cells tend to look
normal.
• Cancer cells
(malignant
tumour cells) look
much more
“unusual”.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
Normal vs Cancerous Cell Division
Copyright © 2010 McGraw-Hill Ryerson Ltd.
Cancer Cells
Cancer Cells
Drinking causes liver cancer
Recap – Videos
Mitosis(1)
Mitosis(2)
Classwork
WORKSHEET: “Mitosis” &
“Getting to Know the Cell Cycle”
NOTE: BIOLOGY TEST #1 - Fri. May 17