BIOL 202 Lecture Notes - Lecture 11: Environmental Noise, Twin Study, Heritability

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In the conferences, ta"s bring their own problems in addition to the problem sets, to give insight into the kind of problems we will be faced with. Really need to find a copy of the 10th edition. Quantitative traits, (polygenic or continuously varying traits) trying to understand the underlying genetic basis of these kind of traitsdifficult cuz under influence of multiple genes, hard to tease apart, also, there is environmental noise interrupting this. Only when you have heritable variation that you can see some kind of response to selection. Important to know if theres underlying heritable basis. If a disease is genetic, maybe we can target that gene for therapeutic purposes. (important both in agriculture and in medicine) If you have a population wt a lot of variation (ex: bristles on drosophila) you can select upwards or downwards from 36 bristles relatively easily, theres not much heritable variation at some point.

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