1. Heterochromatin-Proliferation an den Speicheldrüsen-Chromosomen von Chironomus melanotus

   • H. -G. Keyl
   • Klaus Hägele

   OriginalPaper Pages: 223 - 230

2. The elimination and differentiation of chromosomes in the germ line of sciara

   • Sally M. Rieffel
   • Helen V. Crouse

   OriginalPaper Pages: 231 - 276

3. Segregation of tritium-labeled DNA at meiosis in chorthippus

   • Peter B. Moens

   OriginalPaper Pages: 277 - 285

4. Shifting in the duplication time of sex chromosomes in the rat

   • Nestor O. Bianchi
   • Martha S. A. de Bianchi

   OriginalPaper Pages: 286 - 299

5. The effects of X-rays on the chromosomes of locust embryos

   • D. P. Fox

   OriginalPaper Pages: 300 - 316

6. Histone differentiation and nuclear activity

   • David P. Bloch

   OriginalPaper Pages: 317 - 339

7. Studies in the genus Capsicum

   • Milka Shopova

   OriginalPaper Pages: 340 - 348

8. Studies in the genus Capsicum

   • Milka Shopova

   OriginalPaper Pages: 349 - 356