A Chromosome study of four species and a hybrid of the killifish genus Fundulus (Cyprinodontidae) T. R. ChenF. H. Ruddle OriginalPaper Pages: 255 - 267
Cytological localization of DNA complementary to ribosomal RNA in polytene chromosomes of Diptera Mary Lou PardueSusan A. GerbiJoseph G. Gall OriginalPaper Pages: 268 - 290
An electron microscopic study of the etiology of hybrid sterility in Drosophila paulistorum R. P. KernaghanL. Ehrman OriginalPaper Pages: 291 - 304
Natural variation in nuclear characters of meristems in Vicia faba M. D. Bennett OriginalPaper Pages: 317 - 335
Aberrationsverteilung nach Einwirkung von Myleran auf menschliche Chromosomen in vitro Erich Gebhart OriginalPaper Pages: 336 - 348
Genetic inactivity of heterochromatin and heteropycnosis in Microtus agrestis M. SiegerF. PeraH. G. Schwarzacher OriginalPaper Pages: 349 - 364
Specific nuclear DNA amounts in toads of the genus Bufo Konrad Bachmann OriginalPaper Pages: 365 - 374