BIOL 2400 Chapter 7: Chapter 7.docx

• School: University of Guelph
• Department: Biology
• Course: BIOL 2400
• Professor: Cortland Griswold

Document Summary

Dark mice had dark babies, light mice had light babies. Studied oldfield mice (peromyscus poliontus) that lived in tunnels under sand dunes that. Mice that lived inland that dig tunnels in loamy soil had dark brown fur on top, and a smaller. Dark mainland mice colonized new habitats and evolved new coat colour within a few milennia to the additive effects of alleles (the additive genetic variance). This is the component of variance that causes offspring to resemble their parents, and it causes populations to evolve predictably in response to selection. Hopi hoekstra, biologist at harvard, and her colleagues discovered the molecular foundations. Quantitative genetics: the study of continuous phenotypic traits and their underlying evolutionary. Variance: a statistical measure of the dispersion of trait values about their mean. Vp = vg + ve is attributable to genetic variation among individuals: H^2 = vg/vp = vg/vg+ve effects on trait expression. Starts with distributions of phenotypic values in a population.