1. Genetic regulation of chromosome behaviour in interspecific hybrids of Drosophila

   • M. B. Evgen'ev
   • N. V. Sidorova

   OriginalPaper Pages: 55 - 61

2. No 5-B compensation by rye B-chromosomes

   • M. Roothaan
   • J. Sybenga

   OriginalPaper Pages: 63 - 66

3. Efficiency of selection in layer-type chickens by using supplementary information on feed consumption

   • C. R. Arboleda
   • D. L. Harris
   • A. W. Nordskog

   OriginalPaper Pages: 67 - 73

4. Efficiency of selection in layer-type chickens by using supplementary information on feed consumption

   • C. R. Arboleda
   • D. L. Harris
   • A. W. Nordskog

   OriginalPaper Pages: 75 - 83

5. Die Ermittlung von Korrelationskoeffizienten zwischen aufeinanderfolgenden Messungen in pflanzenzüchterischen Versuchen

   • W. E. Weber

   OriginalPaper Pages: 85 - 93

6. The activity of certain enzymes in the liver of mice, selected for weight gain

   • M. Kownacki
   • A. Kołataj
   • A. Guszkiewicz

   OriginalPaper Pages: 95 - 98

7. Book reviews

   • M. Girbardt
   • W. Dedek
   • B. Rensch

   BookReview Pages: 99 - 100