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13 Cards in this Set
- Front
- Back
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asexual reproduction
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-creation of new individuals whose genes all come from one parent w/out the fusion of egg and sperm
-creates clones -mitotic division |
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advantages of asexual
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-good for sessile animals
-less energy -more secure, more garunteed -able to make more offspring -pass on 100% of genes |
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disadvantages of asexual
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-no genetic diversity, little adaptation
-one disaster can wipe out entire population |
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sexual reproduction
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-offspring created by the fusion of haploid gametes
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advantages of sexual
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-genetic variation
-adaptation -better chances of surviving environmental changes |
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disadvantages of sexual reproduction
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-need to find a partner
-more energy -no garuntee -often more parental care -dangerous |
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Types of asexual
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-fission
-budding -fragmentation/regeneration -parthenogenisis |
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Types of sexual
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-external vs. internal fertilization
-hermaphroditism -sequential hermaphroditism |
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Pros of internal fertilization
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-better protection
-babies more likely to live -good for terrestrial animals which have no water to expel gametes |
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Cons of internal fertilization
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-need to physically find mate
-more energy -less offspring -possibilty of disease/damage |
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Pros of external fertilization
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-no need to physically find mate, can be sessile
-more gametes released -less energy -good for aquatic environments -no parental care |
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Cons of external fertilization
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-less protection
-lower survival rates -need to time release of gametes correctly |
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pheromones
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mate attractants; chemical signals released by one organism that affect the behavior of another
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