Non-random distribution of the pericentromeric heterochromatin in meiotic prophase nuclei of mammalian spermatocytes S. BerríosE. AyarzaR. Fernández-Donoso OriginalPaper Pages: 187 - 195
Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): genetic diversity and its bearing on their relationship V. LiaC.I. ComasJ.H. Hunziker OriginalPaper Pages: 197 - 207
Nature and distribution of constitutive heterochromatin in fishes, genus Hypostomus (Loricariidae) Roberto Ferreira ArtoniLuiz Antonio Carlos Bertollo OriginalPaper Pages: 209 - 214
Karyotype characterization of three species of the genus Trichomycterus (Teleostei, Siluriformes) from Iguaçu river basin Luciana Andreia BorinIsabel Cristina Martins-Santos OriginalPaper Pages: 215 - 221
Structural and genetic studies of the proliferation disrupter genes of Drosophila simulans and D. melanogaster Masanobu ItohSida YuMasa-Toshi Yamamoto OriginalPaper Pages: 223 - 229
Genomic P elements and P-M characteristics of eastern Australian populations of Drosophila melanogaster Masanobu ItohR.C. WoodruffIan A. Boussy OriginalPaper Pages: 231 - 245
Patterns of DNase I sensitivity in the chromosomes of the ant Tapinoma nigerrimum (Hymenoptera, Formicidae) P. LoriteM.F. GarcíaT. Palomeque OriginalPaper Pages: 247 - 250
Age- and sex-distribution of the mutation load Thomas F. HansenDonald K. Price OriginalPaper Pages: 251 - 262
Ribosomal protein S6 cDNA from two Aedes mosquitoes encodes a carboxyl-terminal extension that resembles histone H1 proteins Vida P. HernandezAnn M. Fallon OriginalPaper Pages: 263 - 267