Complex sentence: Vitellogenin is an egg yolk precursor protein expressed in female fish, dormant in male fish and female insects, but in the presence of estrogenic endocrine disruptive chemicals (EDCs), males can express the Vg gene in a dose dependent manner.
Split into simpler sentences: Vitellogenin is an egg yolk precursor protein expressed in female fish, dormant in male fish and female insects. In the presence of estrogenic endocrine disruptive chemicals (EDCs), males can express the Vg gene in a dose dependent manner.