1. Body-weight and chromosome aberrations induced by X-rays in somatic cells of Drosophila melanogaster

   • Antonio De Marco
   • Maria Pia Belloni

   OriginalPaper Pages: 1 - 4

2. Effects of elevation of strain-ploidy on transmission and recombination of mitochondrial drug resistance genes in Saccharomyces cerevisiae

   • Norio Gunge

   OriginalPaper Pages: 5 - 16

3. Heterokaryosis and the role of cytoplasmic inheritance in dark resting structure formation in Verticillium spp

   • Miltiades A. Typas
   • James B. Heale

   OriginalPaper Pages: 17 - 26

4. The effects of “Cell age” upon the lethal effects of physical and chemical mutagens in the yeast, Saccharomyces cerevisiae

   • James M. Parry
   • Peter J. Davies
   • W. Emrys Evans

   OriginalPaper Pages: 27 - 35

5. Inducible, error-free DNA repair in tsl recA mutants of E. coli

   • David W. Mount
   • Candace K. Kosel
   • Anita Walker

   OriginalPaper Pages: 37 - 41

6. Conjugation deficient E. coli K12 F^- mutants with heptose-less lipopolysaccharide

   • Louis M. Havekes
   • Ben J. J. Lugtenberg
   • Wiel P. M. Hoekstra

   OriginalPaper Pages: 43 - 50

7. Role of the bacterial and phage recombination systems and of DNA replication in genetic recombination of UV-irradiated phage lambda

   • Manuel Blanco
   • María Eugenia Armengod

   OriginalPaper Pages: 51 - 54

8. DNA degradation and reduced recombination following UV irradiation during meiosis in yeast (Saccharomyces cerevisiae)

   • Yehiam Salts
   • Giora Simchen
   • Ramon Piñon

   OriginalPaper Pages: 55 - 59

9. Electron microscopy analysis of circular repetitive mitochondrial DNA molecules from genetically characterized Rho^- mutants of Saccharomyces cerevisiae

   • J. Lazowska
   • P. P. Slonimski

   OriginalPaper Pages: 61 - 78

10. Rifampicin-induced protein synthesis: A pre-requisite for increased expression of the ββ′ operon in Escherichia coli

    • Ivor P. B. Tittawella

    OriginalPaper Pages: 79 - 83

11. Mapping the uroporphyrinogen decarboxylase, coproporphyrinogen oxidase and ferrochelatase loci in Bacillus subtilis

    • A Miczák
    • I. Berek
    • G. Ivanovics

    OriginalPaper Pages: 85 - 87

12. Effect of caffeine on the rho^--induction with ethidium bromide in Saccharomyces cerevisiae

    • K. Wolf
    • F. Kaudewitz

    OriginalPaper Pages: 89 - 93

13. Differential effects of nalidixate on the cell growth of respiratory competent strains and cytoplasmic petite mutants of Saccharomyces cerevisiae

    • F. Carnevali
    • L. E. Sarcoe
    • P. A. Whittaker

    OriginalPaper Pages: 95 - 100

14. Cytological and genetic studies of the life cycle of Saccharomycopsis lipolytica

    • Karl Esser
    • Ulf Stahl

    OriginalPaper Pages: 101 - 106