Finding. The mouse oocyte was supposed to pack its mitochondria into a Balbiani body once, then forget it. Yin and Spradling say the cloud comes back in growing follicles, organized around one microtubule-organizing center and again stuffed with mitochondria, Golgi, ER, and endosomes. Quiescence only paused it. When the MTOC later walks from the nucleus to the cortex, microtubules and actin fight, the body disperses, and the nucleus finds the cell center. They argue the structure stays until organelle quality control is finished.
Score 82. Germline mitochondrial selection, a mammal-versus-fish correction. Confidence is high for reassembly, medium for actual mtDNA filtering.
What to do with it If you time germline bottleneck or Balbiani selection, add a second mouse window during follicle growth.