Chromosomes Today: Proceedings of the Ninth International Chromosome Conference held in Marseille, France, 18–21 June 1986

Molecular Cytogenetics.- Genetics of Heterochromatin in Drosophila and Maize.- Chromosome Accomodation to Integration of Foreign DNA.- Rapidly Evolving Bkm DNA is Associated with Hypervariable Domains.- Chromosomes of Drosophila.- Molecular Dissection of the Drosophila Chromosome.- Polytene Chromosomes of Drosophila.- Structure and Function of Y Chromosomal Genes in Drosophila.- Chromosomes and Evolution.- A Model for Heterochromatin Dispersion and the Evolution of C-Band Patterns.- The Role of Chromosomes in Speciation: A new Interpretation.- Chromosome Evolution in Marsupials.- Comparative gene Mapping and Primate Evolution.- Chromosomes and Malignant Changes.- Chromosomal Abnormalities in Malignant Lymphoid cell Proliferations. Recent Advances.- Retroviruses with two Oncogenes.- PH1 Chromosome: Cytogenetics and Molecular Aspects.- Sex Chromosomes.- Conservation in toto of the Mammalian X-Linkage Group as A Frozen Accident.- The Genetic Basis of Testis Determination in Man.- A Molecular Analysis of the Human Y Chromosome.- An Evolutionaryly Conserved Early Replicating Segment on the sex Chromosomes of Man and the Great Apes.- Meiosis and Aneuploidy.- Meiotic Behavior of Sex Chromosomes; what is Normal?.- DNAse I Hypersensitivity Characterizes the XY Pairing Region at Meiosis in Man.- Chromosome Behaviour at Female Meiosis in two Murine (Robertsonian) Trisomies.- Meiotic Chromosome Pairing in the Human Male. Experience from Surface Spread Synaptonemal Complexes.- The Oocyte Spindle and Predisposition to Aneuploidy in Mice.- Nucleolus Organiser.- The Molecular Organization of the Human Ribo-Somal Gene.- Nucleolus Organizer Regions and Nucleoli: Cytological Findings.- Relations Between Nucleoli and Nucleolus-Organizing Regions During the cell Cycle.- Nucleolar Organisersin Plants.- Immunocytochemical Localization of RNA Poly-Merase I in the Fibrillar Centers of Nucleoli.- Distribution of Rdna and of Its Transcription Sites in the Nucleolus of the Human Sertoli cell.- Association of Ribosomal Genes in the Human Oocyte At Meiotic Prophase. Cytogenetic Consequences.