title: [Abnormal shapes of drake's spermatozoon nucleus].
abstract: An electron-microscopic study was performed to examine the shape abnormities of spermatozoon nuclei of drakes used for breeding. The following shape deviations were observed: round nuclei with one or more chromatin projections, pear-shaped nuclei and those of lobular shape. Spermatozoa with abnormal-shape usually had a smaller quantity of cytoplasma in which the electron-microscopy revealed structures of flagellum in the same form as in normal spermatozoa or in a structurally changed form. The structure of the nucleus of abnormal shapes is not distorted, with the exception of the presence of larger vacuoles. The chromatin of deformed spermatozoon nuclei showed a compsition similar to that in normal spermatozoa.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000648:ultrastructure*; D002843:Chromatin / Q000648:ultrastructure; D004372:Ducks / Q000502:physiology*; D008297:Male; D013094:Spermatozoa / Q000648:ultrastructure*
chemical_list: D002843:Chromatin
vernacular_title: Abnormálne tvary jadra spermie kácera