Ultrastructure of holokinetic mitotic chromosomes and interphase nuclei of Tetranychus urticae Koch (Acari, Tetranychidae) in relation to loss and missegregation of induced fragments M. J. TempelaarL. J. Drenth-Diephuis OriginalPaper Pages: 98 - 103
Closely related species of Drosophila can contain different libraries of middle repetitive DNA sequences Andrew P. Dowsett OriginalPaper Pages: 104 - 108
DNA sequence divergence in the Drosophila virilis group Isolde RiedeElard JacobManfred Renz OriginalPaper Pages: 109 - 115
Study on the somatic pairing of polytene chromosomes Isolde RiedeManfred Renz OriginalPaper Pages: 116 - 123
Unusual genome organization of the marine invertebrate Rapana thomasiana Grosse (Gastropoda) Nedialka G. MarkovaIvan G. IvanovGeorge G. Markov OriginalPaper Pages: 124 - 132
Allocyclic early replicating X chromosome in mice: Genetic inactivity and shift into a late replicator in early embryogenesis O. SugawaraN. TakagiM. Sasaki OriginalPaper Pages: 133 - 138
Human telomeric 6; 19 translocation chromosome with a tendency to break at the fusion point Máximo E. DretsEeva Therman OriginalPaper Pages: 139 - 144
Spontaneous translocations between B chromosomes and the normal complement in the grasshopper Eyprepocnemis plorans N. Henriques-GilP. AranaJ. L. Santos OriginalPaper Pages: 145 - 148
A study on nucleolar silver staining in plant cells. The role of argyrophilic proteins in nucleolar physiology F. J. MedinaM. C. RisueñoM. E. Fernández-Gómez OriginalPaper Pages: 149 - 155
Overamplification of genes in macronuclei of hypotrichous ciliates Günther Steinbrück OriginalPaper Pages: 156 - 163
Synaptonemal complex and a new type of nuclear polycomplex in three higher plants: Paeonia tenuifolia, Paeonia delavayi, and Tradescantia paludosa Jean -Louis KehlhoffnerJoseph Dietrich OriginalPaper Pages: 164 - 170