Professor M. J. Sirks retires from the University of Groningen C. L. Rümke Announcement Pages: ia - iv
Rates of forward and reverse mutation inDrosophila after exposure to mustard gas and X-rays F. H. Sobels OriginalPaper Pages: 31 - 44
Satellite associations and the identification of the Y chromosome in man Janny M. van BrinkP. L. LosAnneke J. Nienhaus OriginalPaper Pages: 45 - 51
The phase contrast microscope in plant cytology G. HaskellE. B. Paterson OriginalPaper Pages: 52 - 58
An assay for chromosomal and chromatid interference in chromosome V ofSaccharomyces Sharon DesboroughErnest E. Shult OriginalPaper Pages: 69 - 78
The chimærical structure of a somatic solanum mutant revealed by ionizing irradiation Aage HeikenGöran Ewertson OriginalPaper Pages: 88 - 94
Implantation and lethality of theyellow mouse Gordon J. EatonM. M. Green OriginalPaper Pages: 106 - 112
Temperature sensitivity of chromosomal polymorphism inDrosophila pseudoobscura Leigh Van ValenLouis LevineJohn A. Beardmore OriginalPaper Pages: 113 - 127
The effects of tandem duplications on crossing over inDrosophila melanogaster M. M. Green OriginalPaper Pages: 154 - 164
Meiosis in hybrids betweenLycopersicon esculentum andSolanum pennellii Gurdev S. KhushCharles M. Rick OriginalPaper Pages: 167 - 183
Developmental homeostasis in X-rayed populations ofDrosophila pseudoobscura A. O. Tantawy OriginalPaper Pages: 222 - 243
Asynapsis in the salivary gland chromosomes ofDrosophila hydei H. D. Berendes OriginalPaper Pages: 288 - 300
Cytogenetical studies inCitrus. Part I S. P. NaithaniS. S. Raghuvanshi OriginalPaper Pages: 301 - 312
An effect of potassium on chiasma frequency and recombination C. N. Law OriginalPaper Pages: 313 - 329