Kinetochore-to-pole connections during prometaphase of the meiotic divisions in Urechis eggs.
D000818:Animals; D002455:Cell Division; D002875:Chromosomes; D005260:Female; D006376:Helminths / Q000166:cytology*; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D010063:Ovum / Q000166:cytology*