BIOL 202 Study Guide - Genotyping, Restriction Fragment Length Polymorphism, Circulatory System
22 Apr 2012
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Quantitative genetics: polygenic: traits influenced by multiple genes, usually influenced by environmental conditions. This typically leads to continuous variation in the trait: remember: mendelian genes still drive quantitative traits. Environmental effects: genotype not equal to the phenotype. These may be environmental effects that induce wrikliness in that pea to give a distribution of wrinkles. Major environmental effects on how much you eat for example. Mean = average (highest peak in the middle) Variance = how variable they are. V = ss/ n = (xi - 2) / n. Each individual"s value (xi), and subtract the mean value of the population ( ) from it (deviation from the average). Square the deviation ( 2) and divide by number of. Ex. drinking, drugs: ve = pure environmental variance, child born in a colder or warmer climate. Change their hair colour or skin colour. Va is particularly important because it determines the degree to which relatives resemble each other.
