title: Triple chromosome pairing in an aneuploid bull spermatocyte.
abstract: A triple synaptonemal complex was observed between three midsized chromosomes in an aneuploid bull spermatocyte. Fifteen other spermatocytes examined from the same animal displayed normal chromosome complements and pairing. This is the second case reported of triple synapsis in a mammal and the first case in an apparently normal individual.
mesh_terms: D000782:Aneuploidy; D000818:Animals; D002417:Cattle; D008297:Male; D008540:Meiosis; D013090:Spermatocytes / Q000648:ultrastructure