We have investigated the dynamics of meiotic prophase I in neonatal ovaries from different wild rodent species, from a laboratory strain ofMus musculus and fromMus musculus × Mus spretus F1 hybrids. We found that almost all stages of prophase I were regularly present in neonatal ovaries from these species and that their transcriptional activity can be assessed by [3H]-uridine incorporation, indicating that postnatal analysis of meiotic chromosomes and synapsis may be conducted as an alternative to the investigation of foetal ovaries.
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Singh, A.P., Maerzke, S., von Deimling, O. et al. Oocytes from pachytene to dictyotene can easily be analysed in neonatal rodents. Chromosome Res 1, 209–213 (1993). https://doi.org/10.1007/BF00710126
- synaptonemal complex