4 2 0 http://purl.obolibrary.org/obo/FBcv_0000454 synthetic 'synthetic' SubClassOf 'origin of mutation' http://purl.obolibrary.org/obo/FBcv_0000492 MR 'MR' SubClassOf 'P-element activity' 'MR' SubClassOf 'PM hybrid dysgenesis' http://purl.obolibrary.org/obo/FBcv_0000484 IR-hybrid dysgenesis 'IR-hybrid dysgenesis' SubClassOf 'transposable element activity' 'IR-hybrid dysgenesis' SubClassOf http://purl.obolibrary.org/obo/FBcv_0003019 http://purl.obolibrary.org/obo/FBcv_0000485 Stalker-hybrid dysgenesis 'Stalker-hybrid dysgenesis' SubClassOf 'transposable element activity' 'Stalker-hybrid dysgenesis' SubClassOf http://purl.obolibrary.org/obo/FBcv_0003020 http://purl.obolibrary.org/obo/FBcv_0003019 I-element activity 'I-element activity' SubClassOf 'transposable element activity' http://purl.obolibrary.org/obo/FBcv_0003020 Stalker element activity 'Stalker element activity' SubClassOf 'transposable element activity'