Post on 12-Jan-2016
Chapter 5: Mitosis is the basis of Asexual Reproduction
Pages 134-167
1
Pages 136-151
5.1 The Cell Cycle and Mitosis
2
5.01 Determine and graph the population growth rate of cells Activity 5-1A page 138
3
5.02 Illustrate and describe the basic processes of cell division.
Outcome covered in 5.02.1 and 5.02.2
4
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.
5
5.02.2 State and briefly describe the four phases of mitosis
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
6
1. ProphaseThe double stranded chromosomes
shorten and thicken.The nuclear membrane begins to fade.
7
2. MetaphaseX-shaped chromosomes are pulled into a single
line across the middle of the cell.
8
3. AnaphaseThe chromatids are pulled to opposite
poles of the cell.
9
4. TelophaseThe nuclear membrane forms around
each set of chromosomes.The cell is ready to divide into two
separate cells.
10
Four phases of mitosis are followed by cytokinesis
11
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
12
5.03 Select various print and electronic sources to examine chromosomes
13
5.03.1 Observe, identify and describe a cell nucleus undergoing division
14
5.03.2 Observe, identify and describe chromosomes in each stage of mitosis
1. http://www.microscopy-uk.org.uk/micropolitan/botany/frame4.html
15
5.03.2 continued…
Pages 152-167
18
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.
19
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--------
21
22
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
24
SPONGE
25
HYDRA
3. FragmentationWhen an organism breaks apart as a
result of injury, each fragment then
develops into a clone of its parent.
26
27
Sea star
28
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.
29
30
Runners
31Bulbs
32
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.
33
34
Bread Mold Spores
35
Puffball
5.05 Use tools and apparatus to investigate growth of yeast cells
36
Core Lab Activity 5-2B Pg. 162-164
5.06 Interpret trends in data, infer and explain relationships among the variables
37
Core Lab Activity 5-2B Pg. 162-164
5.07 Communicate the results of an investigation into yeast population growth
38
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.
39
Continued…
Advantages
Large # of offspring
mean the species
may survive when
conditions change
Advantages
Energy is not
required to find a
mate.
40
Continued…DisadvantagesOffspring are
genetic clones.Negative mutations
can destroy large #s.
Disadvantages
Those produced
close together
must compete.
41
Continued…Disadvantages
Unfavorable
conditions can
wipe out entire
colonies.
42
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