22Genes06x

22Genes06x - Proximate control Genes Evolution of behaviour...

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Unformatted text preview: Proximate control: Genes Evolution of behaviour- natural selection on phenotype- evolution only if heritable vs. parent landing and gape ~no learning- heritable? which gene? - no “gene for a behaviour” heritable differences Single gene?- yellow mutant Drosophila ♂ s less successful courters ( pleiotropy )- bees that don’t remove diseased larvae a. gene for uncapping b. gene for removing- not absolute; thresholds at which mutants perform behaviour Heritability = % variation in trait due to r Problems quantifying: 1. dominance 2. polygenics: pleiotropy (multiple traits), complementarity (2+ genes), epistasis (masking), ... 3. non-random mating (e.g., humans) wife-husband height corr . = +0.3 wife-husband IQ “ = +0.4 4. mutation (altho’ usu. too slow) 5. restricted to env. where comparisons 6. culture- can produce results similar to...
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22Genes06x - Proximate control Genes Evolution of behaviour...

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