Sexual selection has the potential to decrease mean fitness in a population through an array
of costs to nonsexual fitness. These costs may be offset when sexual selection favors …

Sex chromosomes are believed to be stable in endotherms, but young and evolutionary
unstable in most ectothermic vertebrates. Within lacertids, the widely radiated lizard group …

The effective population size (Ne) is a central factor in determining maintenance of genetic
variation. The neutral theory predicts that loss of variation depends on Ne, with less genetic …

Many genes are differentially expressed between males and females and patterns of sex-
biased gene expression (SBGE) vary among species. Some of this variation is thought to …

The tempo of sex chromosome evolution—how quickly, in what order, why and how their
particular characteristics emerge during evolution—remains poorly understood. To …

Body size is a trait that shapes many aspects of a species' development and evolution.
Larger body size is often beneficial in animals, but it can also be associated with life history …

This chapter considers how variation in mating systems affects evolvability in populations
and how we should estimate it. Most models considered in evolutionary quantitative ge ne …

Sexual selection has been suggested to influence the expression of male behavioral
consistency. However, despite predictions, direct experimental support for this hypothesis …

Variance in fitness is thought to be greater in males than in females in many species. If this is
so, there are two potentially contradictory consequences on the efficacy of selection (N es) …

Genome size varies widely across organisms yet has not been found to be related to
organismal complexity in eukaryotes. While there is no evidence for a relationship with …