Electron microscope autoradiographic studies of RNA metabolism in Trillium erectum microspores C. Lindley Kemp OriginalPaper Pages: 137 - 148
The nature and behaviour of supernumerary chromosomes in the rhizirideum group of the genus Allium Milka Shopova OriginalPaper Pages: 149 - 158
A complex sex-chromosome system in the hare-wallaby Lagorchestes conspicillatus Gould P. G. MartinD. L. Hayman OriginalPaper Pages: 159 - 175
Chromosome studies in bovine quintuplets Parvathi K. BasrurD. R. Stoltz OriginalPaper Pages: 176 - 187
Cytological evidence of constant tetraploidy in the bisexual South American frog Odontophrynus americanus Maria Luiza BeçakWilly BeçakMaria Nazareth Rabello OriginalPaper Pages: 188 - 193
Nuclear origin of the mitotic spindle in the oogenesis of Oligotrophus schmidti (Cecidomyiidae; Diptera) Bohdan Matuszewski OriginalPaper Pages: 194 - 207
A comparative chromosome study in the incipient species of the Drosophila paulistorum complex Costas D. Kastritsis OriginalPaper Pages: 208 - 222