There’s a lot in this paper, but the most interesting result was that gene expression in the brains of female stickleback fish changed dynamically depending on the male traits the female was exposed to, and this response differed between sympatric closely-related species. (4/6)

We used the benthic-limnetic species-pair stickleback system to characterize gene expression in the brains of females making mate choice decisions. (3/6)