Figure 1

Multicolour hybridization with 6 DNA probes on normal buffalo metaphase spreads, (A) river type (Bubalus bubalis, 2n = 50,XX); (B) swamp type (Bubalus bubalis, 2n = 48,XY). The X probes showed a signal also on the Y-chromosome; (C) details on straightened swamp chromosome 1 (left) generated by the tandem fusion (TF) of the chromosomes 4 (right, upside down) and 9 of the river type. In the middle the R-banded ideogram of the chromosome.