Mitosis Introduction & (A)sexual reproduction review. January 23, 2013.
Mitosis Review
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Mitosis Review
description
Mitosis Review. The membrane pinches together until two cells are formed. The membrane pinches together until two cells are formed. Cytokinesis. Sister chromatids each become a chromosome. Sister chromatids each become a chromosome. Anaphase. - PowerPoint PPT Presentation
Transcript of Mitosis Review
Mitosis Review
The membrane pinches together until two cells are formed.
The membrane pinches together until two cells are formed.
Cytokinesis
Sister chromatids each become a chromosome
Sister chromatids each become a chromosome
Anaphase
In the middle of this stage, the nuclear envelope has completely disappeared.
In the middle of this stage, the nuclear envelope has completely disappeared.
Prophase
The nucleolus begins to disintegrate.
The nucleolus begins to disintegrate.
Prophase
The chromosomes align along the equator of the cell.
The chromosomes align along the equator of the cell.
Metaphase
Spindle fibers disappear.
Spindle fibers disappear.
Telephase/Cytokinesis
Chromatin coils and forms chromosomes
Chromatin coils and forms chromosomes
Prophase
Chromatids separate at the beginning of this phase.
Chromatids separate at the beginning of this phase.
Anaphase
Nuclear membrane reforms from the endoplasmic reticulum.
Nuclear membrane reforms from the endoplasmic reticulum.
Telephase/Cytokinesis
1. Which phase is this?
1. Which phase is this? Metaphase
Spindle fibers begin to form.
Spindle fibers begin to form.
Prophase
Centrioles separate and migrate to each pole.
Centrioles separate and migrate to each pole.
Prophase
2. Which phase is this?
2. Which phase is this? Prophase
Chromosomes meet at the center of the cell.
Chromosomes meet at the center of the cell.
Metaphase
3. Which phase is this?
3. Which phase is this? T/C
A Chromatid from each pair is attracted to each pole of the cell.
A Chromatid from each pair is attracted to each pole of the cell.
Anaphase
The reappearance of the nucleolus can be noticed and the nuclear membrane
forms.
The reappearance of the nucleolus can be noticed and the nuclear membrane
forms.
Telephase/Cytokinesis
Separate chromosomes are not clearly visible but the chromatin has become
thicker and shorter.
Separate chromosomes are not clearly visible but the chromatin has become
thicker and shorter.
Prophase
4. Which phase is this?
4. Which phase is this? Anaphase
The nuclear envelope has disintegrated.
The nuclear envelope has disintegrated.
Prophase
After cytokinesis is complete, what is the name given to the
resulting two cells.
After cytokinesis is complete, what is the name given to the resulting two
cells.
Daughter Cells
There is one set of single-stranded chromosomes at each end of the cell
during this stage.
There is one set of single-stranded chromosomes at each end of the cell
during this stage.
Telophase
The chromosomes align, single file, midway between the cell’s poles.
The chromosomes align, single file, midway between the cell’s poles.
Metaphase
The chromosomes lose their distinct form and once again appear as a mass
of chromatin.
The chromosomes lose their distinct form and once again appear as a mass
of chromatin.
Telophase
Microtubules form as tiny fibers between the poles.
Microtubules form as tiny fibers between the poles.
Prophase
The cell plate forms.
The cell plate forms.
Telophase/Cytokinesis
End of review
Cell Cycle Review
During this stage, organelles replicate.
During this stage, organelles replicate.
G1
DNA is “proof-read” and mistakes are corrected.
DNA is “proof-read” and mistakes are corrected.
G2
If a cell “fails” a checkpoint, what happens to it?
If a cell “fails” a checkpoint, what happens to it?
It enters G0 and is given more time to grow.
Name the phase when DNA duplication occurs by semiconservative replication resulting in identical sister chromatids.
Name the phase when DNA duplication occurs by semiconservative replication resulting in identical sister chromatids.
S(S stands for “synthesis” of DNA)
During which part of the cell cycle is the cell transcribing mRNA and
translating it into protein?
During which part of the cell cycle is the cell transcribing mRNA and
translating it into protein?
G1 and G2
5-9. List the 5 stages of the cell cycle.
5.
6. 9.
7.8.
10. What occurs during
G0?
5-9. List the 5 stages of the cell cycle. 5.G2, 6.S, 7.M (mitosis), 8.C, 9.G1, 10.Growth
5.
6. 9.
7.8.
10. What occurs during
G0?
End of Cell Cycle Review
