GEN-3000 Chapter Notes - Chapter 21: Human Body Weight, Genetic Correlation, Heritability
11 Dec 2017
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Normal distribution: large number of factors contribute to a measurement. The sample measured for quantitative trait is large. Samples: used if population is too large to measure. The group has to be large enough that phenotypes can be seen often. Mean: provides info about where the central point for the quantitative trait lies. Measured as the sum of the individual values in the sample divided by the number of individual values. Variance can determine degree of genetic control of traits when environment also influences phenotype. Measures how far a set of numbers spreads from its average value. How much deviation there is from the average. Standard deviations: used to express variation around the mean in original units of measurement. Correlation coefficient: used to measure strength of association b/w two traits. Positive correlation (value > 0): genes that cause increase in one trait cause increase in other.
