1. Homosexuelle Zwillinge

   • J. Sanders

   OriginalPaper Pages: 401 - 434

2. A family with albinismus circumscriptus

   • J. Sanders

   OriginalPaper Pages: 435 - 439

3. Zur Frage des Wiederholten Auftretens von Defekterscheinungen

   • Wilhelm Weinberg

   OriginalPaper Pages: 440 - 446

4. The movements of chromosomes within the cell and their dynamic interpretation

   • P. Ch. Koller

   OriginalPaper Pages: 447 - 466

5. Linkage studies in pharbitis nil. IV

   • Yoshitaka Imai
   • Benso Kanna

   OriginalPaper Pages: 467 - 475

6. Inherited changes produced by heat-treatment in Drosophila melanogaster

   • Victor Jollos

   OriginalPaper Pages: 476 - 494

7. Variations in the bud-opening of fagus

   • S. J. Wellensiek
   • Helena L. G. de Bruyn

   OriginalPaper Pages: 495 - 505

8. Linkage between the X and IV chromosomes in drosophila melanogaster

   • Wilson Stone

   OriginalPaper Pages: 506 - 520

9. Notes on genic symbolization

   • S. J. Wellensiek

   BriefCommunication Pages: 521 - 523

10. Polyploid inter-specific hybrids in the genus Fragaria

    • N. Fedorova

    OriginalPaper Pages: 524 - 541