Chromosomal figs (a, c–f) and karyotypes (g–k) obtained from specimens belonging to clones Re1 (a, g, e) Re2a (c, h), Re2b (d, i), Re3 (e, j) and Re4 (f, k). Fluorescent in situ hybridization with the 28S probe (in green) (b) revealed that the fragmentation at the X chromosome in clone Re1 occurred at the telomere opposite to the NOR (b). Simultaneous in situ hybridization with the histone (in blue) and subtelomeric DNA probes (in green) in clone Re2b (i) revealed that the A1–A3 translocation involved the autosome 1 telomere close to the histone cluster. Arrows indicate X chromosomes. Asterisks indicate rearranged autosomes. Bar = 10 mm.