Chapter 5: Mitosis is the basis of Asexual Reproduction Pages 134-167 1.
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Transcript of Chapter 5: Mitosis is the basis of Asexual Reproduction Pages 134-167 1.
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Chapter 5: Mitosis is the basis of Asexual Reproduction
Pages 134-167
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Pages 136-151
5.1 The Cell Cycle and Mitosis
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5.01 Determine and graph the population growth rate of cells Activity 5-1A page 138
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5.02 Illustrate and describe the basic processes of cell division.
Outcome covered in 5.02.1 and 5.02.2
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5.02.1 Define mitosisThe process in which the contents of a
cell’s nucleus divide.Results in two daughter cells identical to
the parent.
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5.02.2 State and briefly describe the four phases of mitosis
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
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1. ProphaseThe double stranded chromosomes
shorten and thicken.The nuclear membrane begins to fade.
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2. MetaphaseX-shaped chromosomes are pulled into a single
line across the middle of the cell.
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3. AnaphaseThe chromatids are pulled to opposite
poles of the cell.
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4. TelophaseThe nuclear membrane forms around
each set of chromosomes.The cell is ready to divide into two
separate cells.
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Four phases of mitosis are followed by cytokinesis
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Sites showing mitosis http://www.cellsalive.com/mitosis.htm http://www.youtube.com/watch?v=-G-
3BDlnK58&feature=PlayList&p=08E14413B4A2B8B2&index=4 http://www.youtube.com/watch?
v=JHRBJgq50dk&feature=PlayList&p=08E14413B4A2B8B2&index=0
http://www.youtube.com/watch?v=eFuCE22agyM&feature=PlayList&p=08E14413B4A2B8B2&index=5
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5.03 Select various print and electronic sources to examine chromosomes
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5.03.1 Observe, identify and describe a cell nucleus undergoing division
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5.03.2 Observe, identify and describe chromosomes in each stage of mitosis
1. http://www.microscopy-uk.org.uk/micropolitan/botany/frame4.html
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5.03.2 continued…
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Pages 152-167
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5.2 Asexual Reproduction
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5.04 Distinguish between sexual and asexual reproduction
Asexual ReproductionOnly one parent is involved.Offspring are identical to the parent.Most reproduce quickly and in large
numbers.
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5.04.1 Explain methods of asexual reproduction using examples
1. Binary fission
2. Fragmentation
3. Budding
4. Vegetative Reproduction
5. Spore Formation20
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1. Binary FissionA single parent cell
replicates its genetic material and divides into two equal parts.
Amoeba--------
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Bacteria
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2. BuddingPart of the cell pushes
outward to form an outgrowth or bud.
The bud pinches off to form the new offspring identical to parent.
Not all buds break away.
23yeast
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SPONGE
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HYDRA
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3. FragmentationWhen an organism breaks apart as a
result of injury, each fragment then
develops into a clone of its parent.
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Sea star
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Japanese Knotweed
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4. Vegetative Reproduction
Occurs when special cells, in
plants and roots, divide repeatedly
to form structures that will
eventually develop into plants
identical to the parent.
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Runners
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31Bulbs
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5. Spore FormationA spore is a reproductive cell that
grows into a new individual by mitosis.Light in weight.Rely on water, or wind to carry spores
away from parent plant.
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Bread Mold Spores
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Puffball
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5.05 Use tools and apparatus to investigate growth of yeast cells
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Core Lab Activity 5-2B Pg. 162-164
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5.06 Interpret trends in data, infer and explain relationships among the variables
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Core Lab Activity 5-2B Pg. 162-164
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5.07 Communicate the results of an investigation into yeast population growth
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Core Lab Activity 5-2B Pg. 162-164
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5.08 Summary of comparison for asexual and sexual reproductionAdvantages
Large # of
offspring are
produced quickly.
Advantages
Large colonies can
form to out
compete.
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Continued…
Advantages
Large # of offspring
mean the species
may survive when
conditions change
Advantages
Energy is not
required to find a
mate.
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Continued…DisadvantagesOffspring are
genetic clones.Negative mutations
can destroy large #s.
Disadvantages
Those produced
close together
must compete.
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Continued…Disadvantages
Unfavorable
conditions can
wipe out entire
colonies.
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Videos…Asexual reproduction http://www.youtube.com/watch?
v=tWfgpHKP0_4&feature=PlayList&p=08E14413B4A2B8B2&index=6
http://www.youtube.com/watch?v=drcnTg7ZCoc&feature=PlayList&p=08E14413B4A2B8B2&index=9