BIOL3044 Lecture Notes - Lecture 3: Allele Frequency, Quantitative Genetics, Genetic Variation
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Lecture 3: quantitative traits and gene effects thereon. How are quantitative traits actually influenced/affected/caused by underlying genes that are inherited when individuals give birth to offspring. A" or a" allele) affect a trait that has continuous variation (something measured in quantities) When we think of genetics, we think of distinct/discrete classes (ex. White flower vs. purple flower: we usually study genetics in terms of distinct classes or distinct alleles and genotypes (ex. We measured things by allele frequencies (p, q) and diversity (he = 2pq) Many of the traits that are under selection do not fall into discrete categories: continuously distributed quantitative traits, height, gradation of heights from tall to short, beak size, max. swimming speed, cannot be measured by allele frequencies. Variation of a quantitative trait: mean and variance. We tend to measure quantitative traits from the mean and variance. Deviation: how much it differs from the average: ex.
