Summary
A No. 15 chromosome with a short arm longer than usual is observed in two phenotypically normal brothers. This chromosome appears to have no visible satellite, shows no N-band staining, and is never involved in satellite association. These results have led us to the conclusion that this chromosome lacks the nucleolus organizer region.
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de Capoa, A., Ferraro, M., Archidiacono, N. et al. Nucleolus organizer and satellite association in a variant D-group chromosome. Hum Genet 34, 13–16 (1976). https://doi.org/10.1007/BF00284428
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DOI: https://doi.org/10.1007/BF00284428