Cytogenetic map Deletion map A cytogenetic map showing chromosome banding patterns in mutant cell lines relative to the wild type. A cytogenetic map is built from a set of mutant cell lines with sub-chromosomal deletions and a reference wild-type line ('genome deletion panel'). The panel is used to map markers onto the genome by comparing mutant to wild-type banding patterns. Markers are linked (occur in the same deleted region) if they share the same banding pattern (presence or absence) as the deletion panel. beta12orEarlier Deletion-based cytogenetic map