The fine structure of nuclei as revealed by electron microscopy. VI. Relationship between nucleolus formation and sex chromosomes in the type A mouse spermatogonia.
D000818:Animals; D001485:Basement Membrane; D002466:Cell Nucleolus; D003594:Cytoplasmic Granules; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D012730:Sex Chromosomes; D013094:Spermatozoa / Q000166:cytology*