Figure 4.

Fusion chromosomes resulting from all theoretically possible end-to-end fusions between different types of monocentric chromosomes. Only three chromosome types are shown: metacentric (M), acrocentric (A), and telocentric (T). With the exception of centric fusion (T/T translocation), all fusion chromosomes are primarily dicentric, with the two centromeres separated by a fluctuating distance. Fusions involving telocentric and acrocentric chromosomes, and probably sometimes between two acrocentric chromosomes, are referred to as Rb translocations/fusions.