Oxytocin is an endogenous neuropeptide hormone that influences social behaviour and bonding in mammals. Variations in oxytocin receptor (OXTR) expression may play a role in the social deficits seen in
The faunal changes that occurred in the few million years before the Cretaceous–Paleogene extinction are of much interest to vertebrate palaeontologists. Western North America preserves arguably the b
Genes with sex-biased expression are thought to underlie sexually dimorphic phenotypes and are therefore subject to different selection pressures in males and females. Many authors have proposed that
