has part characteristic of part of has modifier quality phenotypic class phenotype The subclasses of this term classify Drosophila phenotypes into different common categories. They have been chosen by FlyBase to reflect phenotype terms most often reported by Drosophila researchers in the published literature. FBcv:0001347 phenotypic class phenotypic_class Any abnormality in or loss of some anatomical structure or biological process compared to wild-type. abnormal