Matt Notes - Dr Matthew Wund BIOL 105 Evolution 9.28.07...

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BIOL 105 – Evolution 9.28.07 Phenotypic Plasticity and its Implications for Evolution I) How Are Traits Inherited? 1) DNA – (DNA, proteins and reproduction) 2) The Environment and Phenotype a Environment plays a critical role in determining an organism’s phenotype b Effects of the environment do not get passed to offspring with the following exceptions: (i) Mutations in gamete’s genes caused by some environmental factors (ii) “Maternal effects” Offspring inherits its parent’s habitat or resources Quality of the egg or developmental conditions influences quality of the offspring (iii) Social learning behavior c Genes can encode a particular response to the environment, which can be passed to offspring 3) Phenotypic Plasticity - Individual Organisms/Genotypes that Express Flexible Traits a Definition: the property of a given genotype to produce different phenotypes across environmental conditions b Same genes, different traits (i) Grows to a certain size (ii) Change habitats (iii) Alter hunting strategies c May apply to any type of trait (e.g., behavior, bone length, etc.)
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Matt Notes - Dr Matthew Wund BIOL 105 Evolution 9.28.07...

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