Version of the MGED Ontology. An abnormality of a chromosome's number or structure, which excludes simple changes in sequence and is usually detectable by cytogenetic and microscopic techniques such as FISH. MO_78 abstract deleted_term ontology 1.1.7 some|has_chromosomal_aberration_classification|ChromosomalAberrationClassification The term was deleted from the MGED CoreOntology.