Download Mitosis – cell division of body cells

Mitosis – cell division of body cells
Front of Paper
Back of Paper
Interphase
Prophase
Prophase
Interphase
Metaphase
Anaphase
Anaphase
Metaphase
Telophase
Cytokinesis
Cytokinesis
Telophase
Mitosis
Terms to Know
• Mitosis – is the process of cell division in
body cells (skin, blood, nerve, bone,
muscle..), where one parent cell divides
into two identical daughter cells.
• Diploid cell (2n) – parent or daughter
cell(s) that has 46 chromosomes.
• Mitosis is an essential process in order
for life to continue.
6 Stages of Mitosis
Stage 1. Interphase
• Parent cell (Diploid – 2n)
• Chromosomes copy
themselves in the
nucleus, and are
attached by a structure
called a centromere.
Onion Cell
Stage 1. Interphase
(Draw this picture.)
Centrioles
Centromeres
Nuclear
Envelope
Nucleolus
Cell
Membrane
Nucleus
Duplicated
Chromosomes
Stage 2. Prophase
• Nuclear envelope
disappears.
• Chromosomes shorten
and thicken.
• Spindle fibers begin to
extend from centrioles.
Onion Cell
Stage 2. Prophase
(Draw this picture.)
Centrioles
(Start to move and attach to SPINDLE FIBERS)
Nuclear
Envelope
(Disappears)
Duplicated
Chromosomes
(Shorten & Thicken)
Stage 3. Metaphase
• Centromeres, holding
copied chromosomes,
attach to the spindle
fibers.
• Copied chromosomes line
up in the middle of the
cell.
Onion Cell
Stage 3. Metaphase
(Draw this picture.)
Spindle Fibers attached to
the centromeres.
Duplicated chromosomes line
up in the center of the cell.
Stage 4. Anaphase
• Copied chromosomes
separate.
• Spindle fibers pull
chromosomes toward
opposite sides of the
cell.
o
Onion Cell
Stage 4. Anaphase
(Draw this picture.)
Spindle fibers separate “twin” chromosomes, and pull them to
opposite sides of the cell.
Stage 5. Telophase
• Chromosomes cluster
together at opposite
sides of the cell.
• A nuclear envelope
forms around each
set of chromosomes.
• Chromosomes
become longer and
thinner.
Onion Cell
Stage 5. Telophase
(Draw this picture.)
Nuclear Envelope forms around each set of chromosomes.
Chromosomes thin and lengthen.
Stage 6. Cytokinesis
Process begins during Anaphase and is completed
after Telophase.
• Pinching of the cell membrane until there is an
equal division of the cytoplasm and other cell
organelles.
• Forms 2 new Daughter cells (DIPLOID - 2n)
Onion Cells
Stage 6. Cytokinesis
(Draw this picture.)
Two NEW Daughter Cells = DIPLOID (2n)
Return to Interphase
• Daughter cell go on
about their normal
cellular functions.
• Process starts over.
• Takes approximately
24 hours for entire
mitotic process.
Onion Cells
Mitosis Animation
Mitosis: An Interactive Animation