1. Localization of factors controlling spermatogenesis in the nonfluorescent portion of the human y chromosome long arm

   • L. Tiepolo
   • Orsetta Zuffardi

   Original Investigations Pages: 119 - 124

2. Constitutional chromosomal breakage

   • F. Giraud
   • S. Ayme
   • M. G. Mattei

   Original Investigations Pages: 125 - 136

3. Lack of linkage between gene(s) controlling the synthesis of the seventh component of complement and the HLA region on chromosome No. 6 in man

   • Ch. Rittner
   • W. Opferkuch
   • P. Wernet

   Original Investigations Pages: 137 - 142

4. Effects of inhibitors of DNA, RNA and protein synthesis on frequencies and types of premature chromosome condensation from X-ray induced micronuclei

   • S. Madle
   • J. Nowak
   • G. Obe

   Original Investigations Pages: 143 - 149

5. Partial trisomy 9q- chromosomal syndrome

   • I. Šubrt
   • M. Janovský
   • J. Jodl

   Original Investigations Pages: 151 - 154

6. Partial trisomy 20p derived from a t(18;20) translocation

   • Kenneth M. Taylor
   • Howard L. Wolfinger
   • Uta Francke

   Original Investigations Pages: 155 - 162

7. Expansion and contraction of hypomelanotic areas in human piebaldism

   • Brian K. Davis
   • Lori D. Verdol

   Original Investigations Pages: 163 - 170

8. Comparative investigations on cytogenetic effects of X-irradiation on the germinal epithelium of male mice and Chinese hamsters

   • R. Rathenberg
   • H. Schwegler
   • W. Miska

   Original Investigations Pages: 171 - 183

9. Quantitative and qualitative study of acrocentric associations in 109 normal subjects

   • J. F. Mattei
   • S. Ayme
   • F. Giraud

   Original Investigations Pages: 185 - 194

10. Staining of the spindle apparatus in human lymphocyte and fibroblast cultures

    • F. Pera
    • K. Sperling

    Original Investigations Pages: 195 - 197

11. An improved technique for selective silver staining of nucleolar organizer regions in human chromosomes

    • S. E. Bloom
    • C. Goodpasture

    Original Investigations Pages: 199 - 206

12. Stability of X chromosome differentiation in mouse embryos

    • Nobuo Takagi

    Short Communications Pages: 207 - 211

13. Production of C and T bands in human mitotic chromosomes after heat treatment

    • Yves Chamla
    • Marie Ruffié

    Short Communications Pages: 213 - 216

14. Possible intrachromosomal duplication in a case of trisomy 9p

    • H. Chiyo
    • J. Furuyama
    • F. Ikoma

    Clinical Case Reports Pages: 217 - 221

15. A satellited Yq chromosome associated with trisomy 21 and an inversion of chromosome 9

    • Patricia N. Howard-Peebles
    • Gayle R. Stoddard

    Clinical Case Reports Pages: 223 - 225

16. Trisomy 4p due to a paternal t(4p-;16p+) translocation

    • Th. Bauknecht
    • F. Betteken
    • W. Vogel

    Clinical Case Reports Pages: 227 - 230