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14 Cards in this Set
- Front
- Back
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costs of sexual reproduction
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risky (predators)
splitting your genome in half MOC energetic investment requires someone else competition |
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benefits of sexual reproduction
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increase genetic diversity of offspring --> helps fuel evolution
increased efficacy of selection mutations are less of a problem Mueller's Ratchet |
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mueller's ratchet
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process by which the genomes of an asexual population accumulate deleterious mutations in an inrreversible manner
can be solved by sexual reproduction or another form of recombination |
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gametes of the same species are different sizes
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anisogamy
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why females should be choosy?
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their gametes are more valuable
males are in a deperate race to reproduce |
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sexual selection- darwin
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"arises from the advantages that certain indv have over others of the same sex and species in exclusive relation to reproduction"
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powerful selective force on animals
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mate choice
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difference b/t inter and intrasexual sexual selection
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intersexual- doing something to make you more desireable (between sexes)
intrasexual- competing within a sex |
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what can give rise to sexual diomrphism?
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both types of sexual selection
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4 types of mate choice
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1. direct benefits
2. good genes 3. runaway selection 4. sensory bias and sensory exploitaiton |
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direct benefits
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females choose males b/c there are direct benefits to the female such as...
resources male's terriotry male's skills at protecting female and offspring male's skills at paternal care |
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good gene,
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selecting particular males b/c they have genetic material that you deem superior
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good genes indicators
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are indicative of the males' genetic qualities
honest indicators |
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honest indicators
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things you can't fake such as...
coloration (increased disease/parasite resistance) fighting ability symmetry/ developmental stability chemical cues |
