Fig. 6

rDNA clusters revealed by FISH with 18S rDNA probe (red signals); chromosomes were counterstained with DAPI (in grey scale). a 1 – interphase nuclei. 2, 3 – premitotic and mitotic plates with rDNA signals. 4 – karyotype derived from the cell shown in (2). Scale bar – 10 μm. b 18S rDNA clusters on chromosomes 3,6,10. Chromosomes from different spreads are combined with their ideograms (Fig. 3). Black arrow indicates the increase of detected rDNA signals frequency