I am interested in understanding the mechanisms that underlie phenotypic evolution. My current research focuses on the role of developmental mechanisms in the evolution of phenotypic plasticity. In particular, I am interested in the evolution of polyphenisms, a form of plasticity that gives rise to discrete alternative phenotypes. I aim to reveal how polyphenisms evolve by modeling the evolution of their underlying developmental regulatory architecture. In addition, I will apply the model to the specific case of environmental sex determination and study how evolutionary transitions in sex-determining systems are mediated by the evolution of gene regulatory networks. During my PhD, my research focused on the role of symbionts in the evolution of their hosts. In particular, I worked on Wolbachia, widespread bacterial endosymbionts of insects and other arthropods. These symbionts affect development and reproduction of their hosts in remarkable ways, and I theoretically investigated several of Wolbachia‘s effects on host phenotype and their evolutionary consequences.