Meiotic Studies in Dysdercus Guérin Méneville 1831 (Heteroptera: Pyrrhocoridae). I. Neo-XY in Dysdercus Albofasciatus Berg 1878, a New Sex Chromosome Determining System in Heteroptera María José BressaAlba G. PapeschiMarcelo L. Larramendy OriginalPaper Pages: 503 - 508
Comparative Chromosome Painting Between Marsupial Orders: Relationships with a 2n = 14 Ancestral Marsupial Karyotype A. A. De LeoN. GuedelhaJ. A. M. Graves OriginalPaper Pages: 509 - 517
Exclusive Localization of Tandem Repetitive Sequences in Subtelomeric Heterochromatin Regions of Leymus Racemosus (Poaceae, Triticeae) Masahiro KishiiKiyotaka Nagaki*Tetsuo Sasakuma OriginalPaper Pages: 519 - 529
Genomic Differentiation of 18S Ribosomal DNA and β-Satellite DNA in the Hominoid and its Evolutionary Aspects Hirohisa HiraiTakahiro TaguchiAndrew K. Godwin OriginalPaper Pages: 531 - 540
The ZW Pairs of Two Paleognath Birds From Two Orders Show Transitional Stages of Sex Chromosome Differentiation M. I. PigozziA. J. Solari* OriginalPaper Pages: 541 - 551
Homozygotes for FRA16B are Normal Trudy HockingWolfgang FeichtingerGrant R. Sutherland OriginalPaper Pages: 553 - 556
Comparative Chromosome Banding of Two South-American Species of Rice Rats of the Genus Oligoryzomys (Rodentia, Sigmodontinae) V. M. AniskinV. T. Volobouev OriginalPaper Pages: 557 - 562
The Relative rDNA Content of a NOR Determines its Level of Expression and its Probability of Becoming Active. A Sequential Silver Staining and In-Situ Hybridization Study F. ZuritaR. JiménezM. Burgos OriginalPaper Pages: 563 - 570
A Molecular Cytogenetic Clone Resource for Chromosome 22 Margaret A. LevershaIan DunhamNigel P. Carter OriginalPaper Pages: 571 - 573
Human Gene Mapping Report. Human FUSE Binding Protein 3 gene (FBP3). Map position 9q33-34.1. N. BouchirebM. S. Clark OriginalPaper Pages: 577 - 577