Fig. 4

Dicentric chromosomes and chromosome instability. Representation of the possible origins of dicentric chromosomes that arise from chromosome/telomere fusions or neocentromere formation in the presence of a functional original centromere. During anaphase onset, the dicentric chromosome that is attached by opposing mitotic spindle fibers is trapped, leading to anaphase and chromosome bridges and, consequently, DNA damage and chromosome instability. Centromere inactivation could restore faithful segregation by preventing incorrect spindle attachment