has part characteristic of has modifier abnormal mitotic cell cycle abnormal endomitotic cell cycle phenotypic_class Phenotype that is any abnormality in endomitotic cell cycle (GO:0007113). 'endomitotic cell cycle' is defined as: 'A mitotic cell cycle in which chromosomes are replicated and sister chromatids separate, but spindle formation, nuclear membrane breakdown and nuclear division do not occur, resulting in an increased number of chromosomes in the cell.' endomitotic cell cycle defective FBcv:0000672 endocycle defective endomitotic cell cycle abnormal process quality