1. Preface

   EditorialNotes 01 December 1980 Pages: IX - IX

2. Continuous variation: Possible role of regulatory genes

   • F. J. Ayala
   • J. F. McDonald

   OriginalPaper 01 December 1980 Pages: 1 - 15

3. Prevalence of non-Robertsonian polymorphism in the gerbil Gerbillus cheesmani from Kuwait

   • F. M. Bard
   • R. L. Asker

   OriginalPaper 01 December 1980 Pages: 17 - 22

4. Mice with Robertsonian translocations in experimental biology and medicine

   • V. S. Baranov

   OriginalPaper 01 December 1980 Pages: 23 - 32

5. B-chromosomes and comparative karyology of the mice of the genus Apodemus

   • T. S. Bekasova
   • N. N. Vorontsov
   • V. P. Korablev

   OriginalPaper 01 December 1980 Pages: 33 - 43

6. Chromosome C- and G-banding patterns in a bulgarian population of Microtus guentheri Danford & Alston (Microtinae, Rodentia)

   • R. G. Belcheva
   • Ts. H. Peshev
   • D. Ts. Peshev

   OriginalPaper 01 December 1980 Pages: 45 - 48

7. An analysis of the chromosomes of leaf-hoppers (Cicadellidae, Homoptera)

   • A. K. Bhattacharya

   OriginalPaper 01 December 1980 Pages: 49 - 55

8. Karyotypical features and taxonomic position of the genus Eusimulium (Diptera: Simuliidae)

   • L. A. Chubareva

   OriginalPaper 01 December 1980 Pages: 57 - 61

9. Chromosome differences in Peromyscus maniculatus populations at different altitudes in Colorado

   • L. K. Dixon
   • B. A. Nelson
   • R. L. Priest

   OriginalPaper 01 December 1980 Pages: 63 - 68

10. Origins of Euploid chimerism in embryos of Gallus domesticus

    • N. S. Fechheimer
    • R. G. Jaap

    OriginalPaper 01 December 1980 Pages: 69 - 72

11. Evolution of five multilocus isozyme systems in the chordates

    • Suzanne E. Fisher
    • James B. Shaklee
    • Gregory S. Whitt

    OriginalPaper 01 December 1980 Pages: 73 - 85

12. Karyological studies on European rats

    • R. Gamperl

    OriginalPaper 01 December 1980 Pages: 87 - 92

13. Comparative study of G- and C-banded chromosomes of Gerbillus campestris and Meriones unguiculatus (Rodentia, Gerbillinae)

    • Roswitha Gamperl
    • Gerda Vistorin

    OriginalPaper 01 December 1980 Pages: 93 - 97

14. Chromosomal diversity and an aberrant genetic system of sex determination in the arctic lemming, Dicrostonyx torquatus Pallas (1779)

    • Emily A. Gileva

    OriginalPaper 01 December 1980 Pages: 99 - 103

15. Partial reproductive isolation of subspecies of the California vole, Microtus californicus

    • Ayesha E. GILL

    OriginalPaper 01 December 1980 Pages: 105 - 117

16. Comparative analysis of DNA sequence organization in the vertebrate genome

    • A. A. Ginatulin
    • L. K. Ginatulina
    • N. N. Vorontsov

    OriginalPaper 01 December 1980 Pages: 119 - 126

17. The molecular structure of the mammalian genome

    • L. K. Ginatulina
    • A. A. Ginatulin
    • N. N. Vorontsov

    OriginalPaper 01 December 1980 Pages: 127 - 138

18. Mutational process and microevolution

    • M. D. Golubovsky

    OriginalPaper 01 December 1980 Pages: 139 - 149

19. A general model of karyotype evolution

    • Gerald Holmquist
    • Barry M. Dancis

    OriginalPaper 01 December 1980 Pages: 151 - 163

20. The analysis of genetic consequences of selection and inbreeding in Drosophila melanogaster

    • L. Z. Kaidanov

    OriginalPaper 01 December 1980 Pages: 165 - 181

21. The adaptive value of biochemical polymorphisms in animal and plant populations

    • V. S. Kirpichnikov
    • G. A. Muske

    OriginalPaper 01 December 1980 Pages: 183 - 193

22. Karyological and serological studies in Rana lessonae, R. ridibunda and in their hybrid R. ‘esculenta’ (Amphibia, Anura)

    • S. Koref-Santibanez
    • R. Günther

    OriginalPaper 01 December 1980 Pages: 195 - 207

23. The intraspecific autosome polymorphism of Meriones tristrami Thomas, 1892 (Gerbillinae, Cricetidae, Rodentia)

    • K. V. Korobitsyna
    • V. P. Korablev

    OriginalPaper 01 December 1980 Pages: 209 - 221

24. B-chromosomes in the karyotype of Lacerta parva Boul.

    • L. A. Kupriyanova

    OriginalPaper 01 December 1980 Pages: 223 - 226

25. A comparative study of the manifestations of heterochromosomal chimaerism and mosaicism in cattle

    BriefCommunication 01 December 1980 Pages: 227 - 228

26. Intrageneric divergence in DNA and heterochromatin content in ground squirrels of the genus Citellus

    • E. A. Lyapunova
    • L. K. Ginatulina
    • N. N. Vorontsov

    OriginalPaper 01 December 1980 Pages: 229 - 237

27. A Robertsonian fan in Ellobius talpinus

    • E. A. Lyapunova
    • N. N. Vorontsov
    • V. Ye. Dovgal

    OriginalPaper 01 December 1980 Pages: 239 - 247

28. Genetic variation and ecological adaptations

    • Dragoslav Marinković
    • Nikola Tucić
    • Vladimir Kekić

    OriginalPaper 01 December 1980 Pages: 249 - 262

29. Cytotaxonomic features of species of the subfamily Orthocladiinae (Diptera, Chironomidae) from Bulgaria

    • P. Michailova

    OriginalPaper 01 December 1980 Pages: 263 - 266

30. Two major regulatory genes for mammalian sex determination and differentiation

    • Susumu Ohno

    OriginalPaper 01 December 1980 Pages: 267 - 273

31. Karyological research of Orthocladiinae (Diptera, Chironomidae)

    • N. A. Petrova

    OriginalPaper 01 December 1980 Pages: 275 - 279

32. Evolutionary cytogenetics of Aedine mosquitoes

    • K. S. Rai

    OriginalPaper 01 December 1980 Pages: 281 - 290

33. Chromosomal speciation in a Rassenkreis of Venezuelan spiny rats (genus Proechimys, Rodentia, Echimyidae)

    • Osvaldo A. Reig
    • Marisol Aguilera
    • Myriam Useche

    OriginalPaper 01 December 1980 Pages: 291 - 312

34. Polymorphism of metaphase chromosomes in swine (Sus scrofa L.)

    • P. S. Sysa

    OriginalPaper 01 December 1980 Pages: 313 - 315

35. Cytogenetics of five generations of hybrids between wild and domestic pigs differing in karyotype morphology

    • A. I. Troshina
    • V. N. Tikhonov

    OriginalPaper 01 December 1980 Pages: 317 - 326

36. The selective mortality of different chromosome morphs in Spicara flexuosa Raf.

    • V. P. Vasiliev

    OriginalPaper 01 December 1980 Pages: 327 - 331

37. The B-chromosome system of mammals

    • V. T. Volobujev

    OriginalPaper 01 December 1980 Pages: 333 - 337

38. The effect of isolation on the morphological and genetical divergence of populations

    • N. N. Vorontsov
    • L. V. Frisman
    • I. I. Fomicheva

    OriginalPaper 01 December 1980 Pages: 339 - 359

39. Variability of sex chromosomes in mammals

    • N. N. Vorontsov
    • E. A. Lyapunova
    • V. E. Dovgal

    OriginalPaper 01 December 1980 Pages: 361 - 372

40. Sex determination in the Dipteran insect Heteropeza pygmaea

    • D. F. Went
    • R. Camenzind

    OriginalPaper 01 December 1980 Pages: 373 - 377

41. Meiotic mechanisms in a parthenogenetic grasshopper species and its hybrids with related bisexual species

    • M. J. D. White

    OriginalPaper 01 December 1980 Pages: 379 - 383