title: Evolution of the synaptonemal complex in Helix aspersa spermatocytes.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus; D002467:Cell Nucleus; D002843:Chromatin; D002875:Chromosomes; D003582:Cytogenetics; D004492:Edetic Acid; D007854:Lead; D008297:Male; D008540:Meiosis; D008854:Microscopy, Electron; D012908:Snails; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology*; D013194:Staining and Labeling
chemical_list: D002843:Chromatin; D007854:Lead; D004492:Edetic Acid