Product Description This is the ninth volume in a distinguished series that presents new theories and frameworks in evolutionary research in order to stimulate discussion and outline progress in the field. The surveys strive to cover the field in its entirety, spanning the disciplines and representing the principle schools of thought. This volume contains chapters on genetic load, the selectionist/neutralist controversy, homogamy and speciation, and the genetics of biased sex ratios in subdivided populations. It will be welcomed by researchers and students interested in the cutting edge of evolutionary biology.