title: Synaptonemal complex complement of man in spreads of spermatocytes, with details of the sex chromosome pair.
abstract: Human pachytene chromosome pairs have been characterized electron microscopically in spread preparations on the basis of synaptonemal complex length, kinetochore position and attached nucleoli when present. The X and Y chromosomes can be followed by their filamentous axial cores from partial synapsis, through precocious disjuction and end-to-end attachment, to differentiation of a network in the sex chromosome pair.
mesh_terms: D002466:Cell Nucleolus / Q000648:ultrastructure; D002875:Chromosomes / Q000648:ultrastructure*; D006801:Humans; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D008854:Microscopy, Electron; D012730:Sex Chromosomes / Q000648:ultrastructure*; D013094:Spermatozoa / Q000648:ultrastructure*