ZOL 341 1st Edition Lecture 26 Outline of Last Lecture I Transgenes II Eukaryotic expression vectors III Site directed mutagenesis IV Shuttle vector Outline of Current Lecture II Normal distribution III Variance IV Partitioning genetic variance V Heritability Current Lecture normal distribution approximation of the distribution of measurements of many biological characteristics variance a measure of the spread of distribution about the mean genetic variance the proportion of phenotypic variance due to genotypic differences environmental variance the portion of phenotypic variance due to variability in environment inhabited by individuals in a population partitioning genetic variance additive variance the added effects of all alleles contributing to the trait dominance variance dominance relationships interactive variance epistatic interactions heritability a measure of the proportion of phenotypic variation that is due to genetic variation values range from 0 1 near 1 indicates that genetic variation is influential near 0 indicates that environmental variation is influential These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute important measure of the potential responsiveness of a trait to a selection broad sense heritability the proportion of phenotypic variation due to total genetic variation VG VP narrow sense heritability proportion of phenotypic variation due to additive genetic variability VA VP
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