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8 Cards in this Set
- Front
- Back
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sexual selection
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the advantage individuals have over the same sex when it comes to reproduction.
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definition of operation sex ratio
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# sexually receptive males: females
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Muller's Ratchet
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asexual species can only accumulate mutations and cannot purge deleterious mutations or evolve defenses to evolving parasites.
Demise of species results from gradual elimination of each least loaded clone. |
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Least loaded clone
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The clone in an asexual species which has the least accumulated mutations.
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Disadvantages of sexual reproduction
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Spend time looking for mate
"Waste" resources on males which cannot reproduce. Result: decreased reproductive rate |
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Conditional sex role
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make the best of what you've got.
If you have food, you can invest in producing large spermatophores. If less food, you can salivate on leaves, if even less than try coercive sex. |
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Protgynous sequential hermaphrodite
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female organs develop first, then male
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Protandrous
example? |
male organs develop first, then female
clownfish-largest in anemone becomes female |
