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…

Pages 152-167

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5.2 Asexual Reproduction

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

1. Binary FissionA single parent cell

replicates its genetic material and divides into two equal parts.

Amoeba--------

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Bacteria

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

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

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

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

5.05 Use tools and apparatus to investigate growth of yeast cells

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Core Lab Activity 5-2B Pg. 162-164

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

5.07 Communicate the results of an investigation into yeast population growth

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Core Lab Activity 5-2B Pg. 162-164

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