title: Hyperdiploid species hybrids for gene mapping in Xenopus.
mesh_terms: D000782:Aneuploidy; D000818:Animals; D005075:Biological Evolution; D002874:Chromosome Mapping; D004912:Erythrocytes / Q000276:immunology; D006824:Hybridization, Genetic; D011003:Ploidies; D014981:Xenopus / Q000235:genetics*