title: An ultrastructural analysis of fertilization in the surf clam, Spisula solidissima. I. Polar body formation and development of the female pronucleus.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus; D002467:Cell Nucleus; D002875:Chromosomes; D003593:Cytoplasm; D004721:Endoplasmic Reticulum; D005260:Female; D005306:Fertilization; D008297:Male; D008540:Meiosis; D008854:Microscopy, Electron; D008974:Mollusca; D010063:Ovum / Q000166:cytology*; D012728:Sex Chromatin