Figure 6.

Metaphase of Halobatrachus didactylus after FISH treatment. The following probes were used: (a) U2 snRNA gene (green signals) versus 5S rDNA (red signals); (b) 18S rRNA gene (green signals) versus U2 snRNA gene (red signals); (c) (GATA)n sequence (green signals) versus U2 snRNA gene (red signals); (d) (GATA)n sequence (green signals) versus 18S rRNA (red signals).