Practice question

Gene dissection and complementation methods reveal how numerous nuclear genes cooperate to build traits through linear biochemical pathways and regulatory networks. Although dataset lists options concerning mitochondrial mutation imprinting and chromosome loss, deletion mapping and somatic hybrid panels use similar logic to correlate absence of chromosome segment with loss of multiple complementation groups simultaneously. Observing loss of phenotype when chromosome missing indicates genes reside there, so chromosome loss phenotype reflects elimination of many functions simultaneously, extending complementation concept to cytogenetic scale of physical mapping and aneuploidy analysis.