Transcript Daily Power point and warm up

1. Please have these
Items on your desk.
AR
Book
Agenda
Puppy
Drawing
Two vocabulary Words:
Prophase
Metaphase
Science
Starters
Sheet
Prophase- Chromosomes condense.
•
Nucleolus disappears
•
Nuclear Membrane disappears
Spindle fibers form and centrioles migrate to the poles of
cells.
Each chromosome becomes attached to a spindle fiber.
•
•
•
•
Metaphase- Chromosomes align in the center of the cell.
•
Each chromosome attaches to a spindle fiber at its
centromere
Hang puppy drawing up.
2. Return graded papers.
Put plant and animal cell drawings in NB
4. Take notes on Mitosis
5. Work on Mitosis worksheet(HW if not
completed in class)
1.
3.
Pages 74 & 75
12/8
Plant and animal
cell drawing
Page 77
12/8
Mitosis notes
Mitosis
Mitosis is the process in which
the nucleus divides to form two
new nuclei. How does mitosis
differ in plants and animals?
5
5
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.
Spindle fibers form between the poles.
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.
• They line up in the middle.
•
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).
Mitosis ends.
Cleaving begins.
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
Interphase
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- Cell Division
P
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M
C
A
T
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http://www.cellsalive.com/mitosis.htm