Complex sentence: Horizontal transfer of parthenogenesis-inducing "Wolbachia", which has been observed in "Trichogramma" wasps, causes infected females to asexually produce fertile females and nonfunctional males.
Split into simpler sentences: Horizontal transfer of parthenogenesis-inducing "Wolbachia", one form of reproductive manipulation, occurs in "Trichogramma" wasps in nature. Parthenogenesis-inducing "Wolbachia" has been observed to cause infected females to asexually produce fertile females and nonfunctional males.