Download Mitosis 5.2

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What are the stages of the cell cycle?
Which stage is dna synthesized?
Which stage is characterized by increase
in cytoplasm and organelles?
Which stage includes cytokinesis?
Which stage does the cell prepare to
undergo mitosis?
Bellwork
Chapter 5.2
Mitosis and Cytokinesis
Objectives 5.2
 Discuss
the major events
that occur during each phase
of mitosis.
 Discuss how cytokinesis
differs in plant and animal
cells.
Prior to Mitosis 5.2
 Interphase
has occurred and
genetic material still in
chromatin form.
 Cells have
◦ made more cytoplasm and organelles
(G1)
◦ Copied DNA (S)
◦ Made structures for cell division (G2)
Mitosis 5.2
Split into 4
Prophase
Metaphase
Anaphase
Telophase
phases.
Mitosis – Prophase 5.2
• Nuclear
envelope breaks
down.
• Chromatin fibers condense
into chromosomes.
• Chromosomes are joined to
make sister chromatids.
Mitosis – Prophase 5.2
• Mitotic
spindle forms
attaching microtubules to
each chromatid.
• Chromosomes are pulled
toward the middle of the
cell.
Mitosis – Metaphase 5.2
 Chromatids
line in the
middle of the cell attached
to spindle microtubules.
 Chromatids line up halfway
between the two halves
(poles) of the cell.
Mitosis – Anaphase 5.2
Sister chromatids split up from
their partner.
• Each chromatid is now considered
a daughter chromosome.
• Chromosome moves towards the
poles of the spindle by moving up
the microtubule while it shortens.
•
Mitosis – Telophase 5.2
 Chromosomes
reach the poles of
the cell.
 Spindle disappears while nuclear
envelopes reform around each
set of daughter chromosomes.
 Chromosomes uncoil forming
chromatin.
Cytokinesis 5.2
Completes
cell division
by splitting the
cytoplasm into two
daughter cells.
Usually occurs along with
telophase.
In Summary 5.2
•Eukaryotic cells reproduce
by mitosis, the process of
nuclear division and
cytokinesis, the process of
cytoplasm division.