BIOL 105 Lecture Notes - Lecture 10: Phenotypic Trait, Genetic Linkage, Basal Metabolic Rate
Document Summary
Outline: types of selection experiments, premises of selective breeding, examples of selection experiments, selection limits, garland lab selection experiment, test your knowledge! Selection experiments, show experimentally, what might happen during future evolution! Crossing a selected population with a non-selected or oppositely-selected population facilitates genetic mapping: a powerful way to demonstrate mechanism (i. e. how organisms work!) Observe correlated response in lower-level trait that you hypothesize causes the organismal difference. Test that hypothesis by performing a second experiment, selecting on the lower-level trait. Types of selection experiments: domestication, adaptation to human-controlled conditions, example: domestication of dogs. Some top or bottom fraction of individuals is chosen as the breeders to produce the next generation: within-family selection. Taking the highest or lowest scoring male + female within each family. Increases effective population size, reduces rate of inbreeding (breeding within the same family), and helps to eliminate confounding influences of some maternal effects.
