The fourth edition of the book continues this tradition the book provides an excellent summary of the basics of population genetics as usually taught this can be pretty boring stuff but the authors have read widely and are able to enliven the discussion where it is needed. Principles of population genetics fourth edition is a thoroughly updated introduction to the field that is at last ascending to its rightful position of centrality to evolutionary genomics and human genetics rapid and inexpensive genotyping and sequencing have produced a profusion of data on genetic variation along with a pressing need to inform students from many fields about the models that describe the underlying processes that give rise to observed patterns of genetic variation. Principles of population genetics fourth edition is a thoroughly updated introduction to the field that is at last ascending to its rightful position of centrality to evolutionary genomics and human genetics rapid and inexpensive genotyping and sequencing have produced a profusion of data on genetic variation along with a pressing need to inform students from many fields about the models that describe the underlying processes that give rise to observed patterns of genetic variation. Is title principles of population genetics fourth edition below title principles of population genetics in population genetics fixation is the change in a gene pool from a situation where there exists at least two variants of a particular gene in a given population to a situation where only one of the alleles remains