1. Localization of NORs in karyotypes of four Rana species

   • V. J. Birstein

   OriginalPaper Pages: 149 - 154

2. The B-chromosomes of Locusta migratoria I. Detection of negative correlation between mean chiasma frequency and the rate of accumulation of the B's; a reanalysis of the available data about the transmission of these B-chromosomes

   • J. Cabrero
   • E. Viseras
   • J. P. M. Camacho

   OriginalPaper Pages: 155 - 164

3. Complex sex chromosome system in Eigenmannia sp. (Pisces, Gymnotiformes)

   • L. F. De Almeida Toledo
   • H. Foresti
   • S. De Almeida Toledo Filho

   OriginalPaper Pages: 165 - 169

4. Adriamycin-induced centric fusions in mouse chromosomes: in vivo and in vitro analysis

   • F. N. Dulout

   OriginalPaper Pages: 171 - 176

5. Genome differentiation between two closely related species of Sideritis L. (Lamiaceae)

   • A. M. Fernández-Peralta
   • J. J. González-Aguilera

   OriginalPaper Pages: 177 - 183

6. Phylogenetic relationships in the family Resedaceae L.

   • J. J. González-Aguilera
   • A. M. Fernández-Peralta

   OriginalPaper Pages: 185 - 197

7. Cladistical analysis of primitive G-band sequences for the karyotype of the ancestor of the Cricetidae complex of rodents

   • B. F. Koop
   • R. J. Baker
   • M. D. Engstrom

   OriginalPaper Pages: 199 - 208

8. Heterosis in the flour moth, Ephestia kühniella

   • F. Leibenguth
   • M. Schäfer

   OriginalPaper Pages: 209 - 219

9. Genetic distance in inversion polymorphism among natural populations of Drosophila ananassae

   • B. N. Singh

   OriginalPaper Pages: 221 - 224

10. The occurrence of G-bands in the mitotic chromosomes of the amphibian Xenopus muelleri

    • A. D. Stock

    OriginalPaper Pages: 225 - 228

11. Cytological analysis of constitutive heterochromatin in two species of birds

    • P. Tandon
    • I. Nanda
    • R. Raman

    OriginalPaper Pages: 229 - 234

12. Book reviews

    BookReview Pages: 235 - 237