title: A chromosome mutation affecting the number of nucleoli in Xenopus borealis Parker.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus; D002869:Chromosome Aberrations; D005260:Female; D007621:Karyotyping; D007814:Larva / Q000166:cytology; D008297:Male; D009154:Mutation; D014178:Translocation, Genetic; D014981:Xenopus / Q000166:cytology*