Article: Studies from Campinas State University add new findings in the area of genetics.

"Pseudis paradoxa paradoxa, P. p. platensis, P. bolbodactyla, P.fusca and P. tocantins were analyzed cytogenetically by conventional chromosomal staining, C-banding, silver staining and fluorescent in situ hybridization with an rDNA probe. Pseudis tocantins chromosomes were also stained with distamycin A/DAPI," scientists in Campinas, Brazil report (see also Genetics).

"All of the species had a diploid number of 2n = 24 chromosomes and the nucleolar organizer region (NOR) was located on pair 7. However, the karyotypes could be differentiated based on the morphology of chromosomal pairs 2 and 8, the region that the NORs occupied on the long arms of the homologous ...

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