Referáty a diskusní příspěvky jsou uspořádány do oddílů: I. Origin of Mendelism (Mendel's Discovery and Mendel's Time; C.E. Correns; Mendelism Comes to England; Some Anomalies in the History of Mendelism). II. Establishment ofGenetics (G. Mendel; Mendel's Laws of Heredity and Some Selected Pages from the Establishment of Genetics; Development of Cytogenetics; On Some Cardinal problems of the Contemporary Theory of Mutations). III. Modern Developmentof Genetics (Analysis of Genetic Loci: Génétique cellulaire chez les bactéries; Contributions of Plant Virus Research to Molecular Genetics; Principles of Immunogenetics; Mendel and Evolution). IV. Special Application of Genetics (Plant Breeding and Plant Hybridization; Plant Breeding and Induced Mutation; Interspecific Conversion and Formative Process in the Remote Hybridization of Plants; Mendelism and Animal Breeding; Mendel and Human Genetics; The Use of the Mendelian Unit of Inheritance in Gemellology; Genetics Research of Combination Breeding of Some Useful Characteristic through Hybridization of Some Hexaploids with Some Yugoslav Ecotypes of Tetraploid Wheat.