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BB: Asexual vs. Sexual ReproductionPlease copy this chart in your notebook use the WHOLE page.
Name
Type
(asexualor
sexual)
Whathappens
?
Organismsthat usethis type
+Positives
-Negatives
1. Fission
2. Fragmentation
3. Budding
4. Pollination
5. SexualReproduction
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Asexual vs. SexualReproduction
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Asexual reproduction
Asexual reproduction = one parent.
A form of reproduction which involvesmitosis, no fertilization.The primary form of reproduction for single-celled organisms such as archaea, bacteria,
and protists.Many plants and fungi reproduce mostlyasexually as well.
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Sexual Reproduction
Results in increasing genetic diversity of theoffspring.
Characterized by two processes:meiosis, halving of the number of chromosomesfertilization, combination of two gametes and therestoration of the original number of chromosomes
During meiosis, chromosomes usually cross over =genetic recombination.Primary method of reproduction for the vastmajority of visible organisms, including almost all
animals and plants.
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Fission
AsexualCell splits and
replicated DNAgoes with eachpartProkaryotes,Bacteria+ Fast and easy- Everybody has
the same DNA
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Fragmentation/ regeneration
Asexual
Body of parent
breaks andproducesoffspring
Fungi, moss, sea
stars, planarian+ Easy
- Parent broken,
same DNA
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Fragmentation/ regeneration
Moss
http://upload.wikimedia.org/wikipedia/en/1/1c/Moss_closeup.jpg -
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Budding
Asexual
Offspring grows outof parent
Yeast, hydras
+ Fast, somewhateasy
- Same DNA
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Pollination
SexualPollen is delivered tofemale part of plantFlowering plants+ Plants dont have
to move, mixes DNA
- Need externalsource for pollinationto take place; wind,bee, bat, butterfly
etc.
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Pollination
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Sexual Reproduction
Sexual
DNA from 2
individuals merge toform one
Animals, Plants
+ Diverse DNA
- Takes a long time,2 individuals needed
