Monahan3

Monahan3 - - - - - - Evolution of size variation and growth...

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- Evolution of size variation and growth rate - Some important insights: the evolution of dogs—size, breeds, behavior - Dogs are most variable organism in terrestial ecosystem - “The domestic dog exhibits greater diversity in body size than any other terrestrial vertebrate” (article) - Variation in insulin-like growth factor gene: Present in small breeds; absent in giant breeds - Manahan’s article: ~1.5% of transcribed genes code for a “bigger” animal - Suggest new hypothesis: Only small changes in the genomic toolkit are required to increase size (doesn’t take much to change our size) - Cambrian period (540 million years ago ) - Concept 32.4 : New views of animal phylogeny are emerging from molecular biological-based data o Zoologists recognize about 36 animal phyla o Phyla : (know what is a phyla and what are the criteria for it) taxonomic group based on distinct morphology o Fig 32-11: Know : Ancestral colonial flagellate : Know there’s an ancestral condition Metazoa
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This note was uploaded on 01/27/2011 for the course BISC 120 taught by Professor Webb,wetzer,? during the Fall '07 term at USC.

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Monahan3 - - - - - - Evolution of size variation and growth...

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