title: Cytogenetics of the South American akodont rodents (Cricetidae). IX. Chiasmatic sex bivalent in male meiosis of Akodon mollis.
abstract: Akodon mollis (Rodentia, Cricetidae) has a large subterminal Y chromosome measuring 5.24 percent of the haploid set. The long arm of the Y has a pattern of homology with the short arm of the X, as indicated by the similar distribution of G bands and by the formation of a chiasma in diakinesis and metaphase I of teste cells. Conversely, the short arm of the Y and the long arm of the X are nonhomologous and do not pair at meiosis.
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000235:genetics*; D002871:Chromosome Banding; D002875:Chromosomes / Q000648:ultrastructure; D005260:Female; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D012730:Sex Chromosomes / Q000648:ultrastructure*; D014960:X Chromosome / Q000648:ultrastructure; D014998:Y Chromosome / Q000648:ultrastructure