Experimentally elevated sexual selection increases male manipulation of the female post-mating response, but also makes females poised in readiness for mating and more resistant to male manipulation.
No evidence that Y-chromosome differentiation affects male fitness in a Swiss population of common frogs
Male frogs in the same population with Y chromosomes of varying differentiation level from the X have no significant difference in morphometrics, amplexus success and fathering success.
The Y chromosome of Mercurialis annua is homomorphic yet 1/3 is not recombining and is enriched in sex-biased genes, perhaps a sign of ongoing sexual antagonism.
The level of sexual dimorphism depends on the environment where Silene latifolia grows. We are looking for QTL based on a cross between plants from dry and wet environments, with a special interest to QTL that localise on the sex chromosomes.
Lines with large and small flowers (good for females and males, respecively) have been generated by artificial selection. Gene expression differences between those lines should reveal the first genes that respond to such sexually antagonistic selection.
Incomplete penetrance of sex determination in frogs, and achiasmatic meiosis in males, allows for interesting possibilities in the evolution of a new sex chromosome.