1. Specificity of compaction in meiotic chromosomes of the female Chinese hamster

   • Toby C. Rodman
   • June L. Biedler

   OriginalPaper Pages: 229 - 246

2. Nuclear differentiation and nucleic acid synthesis in well-fed exconjugants of Paramecium aurelia

   • James D. Berger

   OriginalPaper Pages: 247 - 268

3. Cytogenetics of ticks (Acari: Ixodoidea)

   • James H. Oliver Jr.
   • Kazuo Tanaka
   • Massaki Sawada

   OriginalPaper Pages: 269 - 288

4. Accumulation of B-chromosomes by preferential segregation in females of the grasshopper Melanoplus femur-rubrum

   • Zipora Lucov
   • Uzi Nur

   OriginalPaper Pages: 289 - 306

5. Serial sectioning study of some meiotic stages in Scaptericus borrelli (Grylloidea)

   • J. Roberto Sotelo
   • Roberto B. García
   • Rodolfo Wettstein

   OriginalPaper Pages: 307 - 333

6. Synaptonemal-like complexes in Allium cepa Microspores

   • P. Esponda
   • G. Giménez-Martín

   OriginalPaper Pages: 335 - 344