A quantitative electron microscopic analysis of transcription in sea urchin embryos Sharon BusbyAimée Bakken OriginalPaper Pages: 249 - 262
The organization of the ribosomal RNA genes of Chironomus tentans and some closely related species Adelheid DegelmannHans-Dieter RoyerCornelis P. Hollenberg OriginalPaper Pages: 263 - 281
Direct cytological evidence for true terminalization of chiasmata in maize Marjorie P. Maguire OriginalPaper Pages: 283 - 287
Intranuclear fibrillar material in cereal pollen mother cells M. D. BennettJ. B. SmithB. Wells OriginalPaper Pages: 289 - 332
Effect of temperature on morphology and DNA-content of polytene chromosomes in Drosophila Ingeborg Hartmann-GoldsteinDaniel J. Goldstein OriginalPaper Pages: 333 - 346
Chromosome polymorphism in populations of the grasshopper Trimerotropis pallidipennis from southern Argentina Ekaterina S. de VaioBeatriz GoñiCristina Rey OriginalPaper Pages: 371 - 386