title: Pairing modes between homologous chromatids in mammalian spermatogonia.
abstract: This note comments on a mechanism for pairing homologous chromatids. Of interest are two modes: Ortho and Para. Although both yielding antihelical duplexes, the two modes are not equivalent regarding cladistic relations between homologs.
authors.affiliation: USC Medical School, Los Angeles 90033.
authors.forename: G T
authors.initials: GT
authors.lastname: Matioli
mesh_terms: D000818:Animals; D002842:Chromatids / Q000648:ultrastructure*; D006801:Humans; D018386:Kinetochores / Q000648:ultrastructure; D008297:Male; D008540:Meiosis / Q000235:genetics; D008938:Mitosis / Q000235:genetics; D008957:Models, Genetic; D013091:Spermatogenesis / Q000235:genetics; D013093:Spermatogonia / Q000648:ultrastructure*