title: Cytological and ultrastructural comparisons of t12-t12 and normal mouse morulae.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus; D002467:Cell Nucleus; D003593:Cytoplasm; D004622:Embryo, Mammalian / Q000166:cytology*; D005804:Genes, Lethal; D051379:Mice; D008853:Microscopy; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D009154:Mutation