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42613 8 drought of 1977 killed off 85 of finches

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4/26/13 8 Drought of 1977 killed off ~85% of finches Natural selection on beak depth during a drought Number of finches
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4/26/13 9 Natural selection on beak depth during a drought Number of finches Repeated bouts of selection on beak depth
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4/26/13 10 Gene expression patterns for Bmp4 (encodes a bone morphogenic protein) in Galapagos finches Compared expression patterns for various growth factors known to be expressed during craniofacial development. Pattern for Bmp4 correlated with deep and broad beak morphology. Microevolution via gene expression regulation Changes in expression patterns can fine-tune phenotypes Relative importance compared to protein sequence changes still not known!
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4/26/13 11 What about major evolutionary innovations (macroevolution)? Evolution and development Changes in development can have a profound effect on phenotype (morphology). Therefore, focus on the genes involved in determining fundamental morphological patterns during development ( regulatory genes ).
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4/26/13 12 Evolution and development Changes in development can have a profound effect on phenotype (morphology). Therefore, focus on the genes involved in determining fundamental morphological patterns during development ( regulatory genes ). Evolution and development Changes in development can have a profound effect on phenotype (morphology). Therefore, focus on the genes involved in determining fundamental morphological patterns during development ( regulatory genes ). Many of the same genes determine patterns of development in all animals.
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