1. Polytene chromosomes of Oxytricha: Biochemical and morphological changes during macronuclear development in a ciliated protozoan

   • Brian B. Spear
   • Marlene R. Lauth

   OriginalPaper Pages: 1 - 13

2. In situ hybridization of “Nick-translated” ³H-ribosomal DNA to chromosomes from salamanders

   • H. C. Macgregor
   • S. Mizuno

   OriginalPaper Pages: 15 - 25

3. The fluorescence localization of mouse satellite DNA in interphase nuclei

   • John E. Mayfield
   • John R. Ellison

   OriginalPaper Pages: 27 - 31

4. In situ detection of a DNA-polymerase activity in the nuclei of mouse spermatozoa

   • Ph. Chevaillier
   • M. Philippe

   OriginalPaper Pages: 33 - 37

5. Method for the determination of mean densitometric profiles of chromosomes

   • C. Distèche
   • J. Bontemps

   OriginalPaper Pages: 39 - 59

6. Localisation et signification des zones Q observées sur les chromosomes mitotiques de l'amphibien Pleurodeles waltlii Michah. après coloration par la moutarde de quinacrine

   • Simone Bailly

   OriginalPaper Pages: 61 - 68

7. Further studies on polyploid amphibians

   • Itamar Romano Garcia Ruiz
   • Willy Beçak

   OriginalPaper Pages: 69 - 74

8. Karyotypic variation in the Australian Gekko Phyllodactylus marmoratus (Gray) (Gekkonidae: Reptilia)

   • Max King
   • Ruth Rofe

   OriginalPaper Pages: 75 - 87

9. Pairing and segregation of the sex chromosomes in X₁X₂-males of Dysdercus intermedius with a note on the kinetic organization of Heteropteran chromosomes

   • A. Ruthmann
   • R. Dahlberg

   OriginalPaper Pages: 89 - 97