1. Evidence for homologous pairing of chromosomes prior to meiotic prophase in maize

   • Marjorie P. Maguire

   OriginalPaper Pages: 221 - 231

2. Trisomics in diploid alfalfa

   • K. J. Kasha
   • H. A. McLennan

   OriginalPaper Pages: 232 - 242

3. The relationship of abnormal chromosome 10 to B-chromosomes in maize

   • A. J. Snope

   OriginalPaper Pages: 243 - 249

4. Cytological studies on a haploid cultivar of pelargonium, and its colchicine-induced diploids

   • M. G. Daker

   OriginalPaper Pages: 250 - 271

5. Pseudo-multiple formation as a consequence of prolonged non-homologous chromosome association in Metrioptera brachyptera

   • David I. Southern

   OriginalPaper Pages: 272 - 284

6. An interchange which raises chiasma frequency

   • G. M. Hewitt

   OriginalPaper Pages: 285 - 295

7. Die Polytänchromosomen der Borstenbildungszellen von Calliphora erythrocephala

   • Dietrich Ribbert

   OriginalPaper Pages: 296 - 344