title: Synaptonemal complexes in a tetraploid mouse spermatocyte.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000648:ultrastructure; D002875:Chromosomes / Q000648:ultrastructure*; D008297:Male; D051379:Mice; D011123:Polyploidy; D013090:Spermatocytes / Q000648:ultrastructure*; D013094:Spermatozoa / Q000648:ultrastructure*