Behavioral Genetics, Lectures 3 I. P olygenic Behavioral Traits. Most often, behavioral differences for a given trait vary along a continuum - effect of a single gene is hardly detectable.
Many genes affect the trait as a variety of environmental influences.
Must use a different type of analysis. A. Use standard Parametric Statistics to characterize the population variation for a trait and to partition this variation into different source components. I assume you know what variance and means are and how to calculate them. I is small or we use a design that minimizes it. If we know what proportion of the variation for a trait is due to the genetic factors relative to the entire phenotypic variation, we can determine to what extent genetic differences among individuals in a population make a difference phenotypically.