title: Ultrastructure and behavior of the achiasmatic, telosynaptic XY pair of the sand rat (Psammomys obesus).
mesh_terms: D000818:Animals; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D008854:Microscopy, Electron; D008938:Mitosis; D012377:Rodentia / Q000033:anatomy & histology*; D012730:Sex Chromosomes / Q000648:ultrastructure*; D013737:Testis / Q000648:ultrastructure