The organization of macronuclear rDNA molecules of four hypotrichous ciliated protozoans Marshal T. SwantonRobert M. McCarrollBrian B. Spear OriginalPaper Pages: 1 - 9
Elimination of DNA sequences during macronuclear differentiation in Tetrahymena thermophila, as detected by in situ hybridization Ruth Weaver YokoyamaMeng-Chao Yao OriginalPaper Pages: 11 - 22
XXXY sex chromosomes in males of the jumping spider genus Pellenes (Araneae: Salticidae) Wayne Paul Maddison OriginalPaper Pages: 23 - 37
Meiotic effects of supernumerary heterochromatin in Heteropternis obscurella Bernard JohnMax King OriginalPaper Pages: 39 - 65
Normal and BrdC-substituted chromosomes during spermatogenesis with an endomeiotic chromosome reduplication in Carausius morosus Br. Laas P. PijnackerMargriet A. Ferwerda OriginalPaper Pages: 67 - 82
The chromosomes of two Drosophila races: D. nasuta nasuta and D. n. albomicana H. A. RanganathK. Hägele OriginalPaper Pages: 83 - 92
RNA polymerase II transcribes all of the heat shock induced genes of Drosophila melanogaster J. Jose BonnerRobert L. Kerby OriginalPaper Pages: 93 - 108
The regular divisions of the spermatocytes as related to a meiotic lysine-rich protein fraction Michael FriedländerElizabeth Hauschteck-Jungen OriginalPaper Pages: 109 - 118
Asynchronous replication of constitutive heterochromatin on X chromosomes in female Mus dunni S. SenT. Sharma OriginalPaper Pages: 119 - 126
A pachytene analysis of two male-fertile paracentric inversions in chromosome 1 of the mouse and in the male-sterile double heterozygote Ann C. Chandley OriginalPaper Pages: 127 - 135
Interrelationship between chromocentres and chiasmata in radish (Raphanus sativus L.) N. DayalC. PrasadLalit Kumar OriginalPaper Pages: 137 - 141
Spontaneous cell fusion and PCC formation in Bloom's syndrome Priscila G. OttoEeva Therman OriginalPaper Pages: 143 - 148
