has part characteristic of has modifier abnormal cell cycle FBcv:0000671 phenotypic_class Phenotype that is any abnormality in cell cycle (GO:0007049). 'cell cycle' is defined as: 'The progression of biochemical and morphological phases and events that occur in a cell during successive cell replication or nuclear replication events. Canonically, the cell cycle comprises the replication and segregation of genetic material followed by the division of the cell, but in endocycles or syncytial cells nuclear replication or nuclear division may not be followed by cell division.' cell cycle defective phenotype cell cycle abnormal process quality