Germinal plasm and determination of the primordial germ cells.
D000663:Amphibians; D000818:Animals; D001001:Anura; D002454:Cell Differentiation; D004330:Drosophila; D004331:Drosophila melanogaster; D005260:Female; D005854:Germ Cells / Q000502:physiology* / Q000528:radiation effects / Q000648:ultrastructure; D008854:Microscopy, Electron; D009865:Oocytes / Q000648:ultrastructure; D009866:Oogenesis; D011831:Radiation Genetics; D014466:Ultraviolet Rays