a G-banded sex chromosomes in the male common shrew (left) and ideogram with chromosome arms labelled according to the alphabetic nomenclature of Searle et al. (1991) b Schematic diagram of the shrew pachytene sex trivalent, based on Pack et al. (1993) and our data c Electron micrograph of a shrew sex trivalent, XY1Y2 at late pachytene. The true X region and the Y1 are surrounded by electron-dense material. Scale bar: 5┬Ám. d Diagram of the XY1Y2 configuration as represented in Fig. 1c.

  Part of: Matveevsky SN, Pavlova SV, Atsaeva MM, Searle JB, Kolomiets OL (2017) The dual mechanisms of chromatin remodeling in the common shrew sex trivalent (XY1Y2). Comparative Cytogenetics 11(4): 1-19. https://doi.org/10.3897/compcytogen.v11i4.13870