Figure 7

Chromosomal mapping of the 5S and nucleolar rDNA in Engystomops freibergi. Karyotype of E. freibergi hybridized with the probe containing the entire type I 5S rDNA repeating (A), and with the probe containing the entire type II 5S rDNA repeating (B). Arrows indicate the NORs as reported by Targueta et al. [33] for the same specimens (A: ZUEC 14440; B: ZUEC 14458). The morphological difference between the homologues of pair 11 in A, and B results from a C-band and NOR heteromorphism, not observed in the ZUEC 14435 female whose karyotype in shown in Figure7A (for details about this heteromorphism, see [34]).