title: Heterogeneous heterochromatin and size variation in the sex chromosomes of Microtus cabrerae.
abstract: The sex chromosomes of Microtus cabrerae are characterized by large segments of constitutive heterochromatin in both the X and Y. Alkali treatment, enzymatic digestion (trypsin), and fluorochrome staining reveal considerable heterogeneity within these heterochromatic blocks and allow us to distinguish several regions. In addition, variation in the length of these segments is also present, probably as a result of deletions. A possible explanation for the origin of these heterochromatic blocks is discussed.
authors.affiliation: Departamento de Biologia Animal, Ecologia y Genética, Facultad de Ciencias, Universidad de Granada, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Burgos
authors.forename: R
authors.initials: R
authors.lastname: Jiménez
authors.forename: D M
authors.initials: DM
authors.lastname: Olmos
authors.forename: R
authors.initials: R
authors.lastname: Diaz de la Guardia
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000235:genetics*; D002871:Chromosome Banding; D005260:Female; D006570:Heterochromatin / Q000648:ultrastructure*; D008297:Male; D012730:Sex Chromosomes / Q000648:ultrastructure
chemical_list: D006570:Heterochromatin