C. D. Darlington โ{128}{148} In Memoriam -- Molecular Cytogenetics -- Sorting, Cloning and Analysis of Specific Human Chromosomes -- High Resolution Linkage Map of Human Chromosome llp -- Molecular Organisation of the Chromosome -- Z-DNA and Chromosome Structure -- Centromeric DNA in Yeast -- Telomeres and Artificial Chromosomes in Yeast -- Meiosis -- Genic Control of Meiosis -- Application of the Spreading Techniques to Structural Heterozygotes -- Synapsis, Synaptic Adjustment and DNA Synthesis in Mouse Oocytes -- The Synaptonemal Complex in Chromosome Pairing and Disjunction -- X-Inactivation and Its Role in Male Sterility -- Age-Related Aneuploidy and Its Aetiology โ{128}{148} Testing Some of the Hypotheses -- Chromosomes and Cancer -- Chromosomes and Cancer: Chromatinโ{128}{153}s Re-Awakening -- Structure and Function of Chromosomes -- Balbiani Ring Genes and Their Induction -- Active Genes and Puffs -- Mapping of Genetic Activity on Mammalian Chromosomes -- Spatial Order of Chromosomes -- Ordered Arrangement of Chromosomes in Wheat -- Towards a General Model for Spatial Law and Order in Nuclear and Karyotypic Architecture -- Correlation Between Interphase and Metaphase Chromosome Arrangements as Studied by Laser-Uv-Microbeam Experiments -- Chromosomes and Evolution -- Chromosomal Evolution, Speciation and Morphological Change in Vertebrates: The Role of Social Behaviour -- DNA Family Turnover and the Coevolution of Chromosomes -- The Evolution of Sex Chromosomes and Their Consequences for the Evolutionary Process -- The Evolutionary Consequence of Major Genomic Changes in Amphibia -- Linkage Group Conservation and the Notion of 24 Primordial Vertebrate Linkage Groups -- Explosive Chromosomal Speciation in Seismic Active Regions -- Abstracts of Selected Posters -- Author Index