Testosterone relaxes genetic constraints between the sexes

A new study published in Evolution Letters has shown that testosterone shapes the underlying genetic parameters determining how populations respond to selection. Authors Tyler Wittman and Robert Cox tell us more. In many species, females and males look strikingly different. This phenomenon of sexual dimorphism is quite common, but it is puzzling when you consider …

How the sexes are more different than we thought

A new study published in Evolution Letters has revealed widespread and unexpected differences in gene expression architecture between the sexes. Author Dr Wouter van der Bijl summarises the findings and tells us how the study came to be. The perfect male mouse and the perfect female mouse are not the same. The sexes need to …