Figure 4

Conventionally stained karyotypes. (a) Sorex thibetanus from Gansu Province (Lianhuashan), 2n = 42, NFa = 60; (b) Sorex cansulus from Sichuan Province (Songpan County), 2n = 42, NFa = 64. XX: female sex chromosomes. Male sex chromosomes XY are boxed. Pairs bearing NORs in both karyotypes are boxed.