Transcript Cell Cycle and Mitosis ppt

12/8/15
Use the graphic organizer to answer questions
about this visual (boxes 1-4 only)
Date:
12/8/15
Topic:
Cell Cycle and Mitosis
Page # ___
Date:
12/8/15
Topic:
Cell Cycle and Mitosis
Page # ___
Today in Room 326/311…
HW: Mitosis Practice Worksheet
CONTENT OBJ: SWBAT identify and describe the phases of
mitosis
LANG. OBJ: SW discuss in pairs, listen to verbal information,
write descriptions
ANNOUNCEMENTS: Quiz tomorrow on reproduction!!
AGENDA:
Admit Slip
Advantages of Sexual vs Asexual repro
Review answers to quiz packet (1st and 3rd block only)
Cell Cycle
Mitosis notes (4th block only)
Homework Share Out
Advantages of Sexual Reproduction
Review Packet
Take 10 minutes and review answers with your
partners. If you have not finished, pick up where
you left off and then go back to the beginning.
You have 10 minutes
The Cell Cycle
What did
you notice?
Answers for
A-D
The Cell Cycle
Now answer
E & F using
the handout
Pre-assign numbers 1-5 to each
table… Students discuss in pairs.
Think: Cell Processes
1) Why do cells divide?
So organisms can grow and repair!
2) Which cells in the body divide more frequently?
Skin cells
3) Which cells in the body divide less frequently? Brain/nerve cells
4) What stage are they in if they are not dividing? G0
5) Which cell division process creates IDENTICAL cell copies?
Mitosis
6) Which cell division process creates UNIQUE cell copies?
Meiosis
Cell Cycle & Cancer
Cancerous lung cells
Cancer occurs when cells do not receive proper
signaling
“Messed up” cells are normally stopped at the
checkpoints
“Messed up” cells are told to die- known as
apoptosis (programmed cell death)**
Cancer occurs when cells fail to go through
apoptosis, and continue dividing anyway
Stages of Mitosis
Get ready
to write!
Get ready
to write!
First… chromosome vocab!
Copy into journal!!!
Mitosis Video
https://www.youtube.com/w
atch?v=ofjyw7ARP1c
IPMATC
“I pee, Matt see!”
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Stages of Mitosis
Get ready
to write!
Get ready
to write!
Cell Pictures/Labeling
You need to draw how the cell looks for EACH stage of mitosis
You must LABEL the parts of the cell
However, for each additional picture, you only need to label the
NEW structures
Interphase*
NOT part of mitosis
(precedes mitosis)
Includes stages
G1, S, G2
Cellular contents
(organelles) copied
Genetic material
(chromatin) copied
Checked for mistakes
Chromatin is NOT condensed into
chromosomes yet (can’t see it)
Prophase
d
Early Prophase
• Chromatin condenses into
chromosomes (now visible)
Prophase*
Late Prophase
• Nucleolus disappears
• Nuclear envelope breaks
down
• Two centrosomes form;
create mitotic spindle
Metaphase*
Easiest stage to identify
Chromosomes align
down the middle
Known as the
“metaphase
plate”
Microtubules attach to
centromeres of
sister chromatids
Early Anaphase
• Microtubules pull sister
chromatids apart
(centromeres split)
Anaphase*
Late Anaphase
• Individual chromosomes
are pulled by the
microtubules to
opposite poles
(same amount of
genetic material on
either side)
Telophase*
“Reverse of prophase”
Begins after chromosomes
stop moving
Spindle fibers dissolve
Chromosomes uncoil
and revert to chromatin form
A new nuclear envelop
forms around each
chromatin mass (forms nucleus)
Nucleoli appear
Cleavage furrow forms at site of metaphase plate (middle)
Cytokinesis*
Cytoplasm pinches inward
(at the cleavage furrow) until cell
is divided into two identical
daughter cells
Organelles reappear
Both cells can now
start the process again…
Interphase (Begins Again)
d
Animal Cell
vs.
Plant Cell
Identify the stages! Pick people to come up.
Exit Ticket: Identifying
Stages of Mitosis
What’s an easy way to remember the stages?
IPMATC
Interphase, Prophase, Metaphase, Anaphase,
Telophase, Cytokinesis
“I pee, Matt, see!”