1. Genetic counseling in the epilepsies

   • Maria Blandfort
   • Takayuki Tsuboi
   • Friedrich Vogel

   Review Article Pages: 303 - 331

2. Absence of Y-specific DNA sequences in human 46,XX true hermaphrodites and in 45,X mixed gonadal dysgenesis

   • F. Waibel
   • G. Scherer
   • U. Wolf

   Original Investigations Pages: 332 - 336

3. Linkage relationships and allelic associations of the cystic fibrosis locus and four marker loci

   • J. Schmidtke
   • M. Krawczak
   • R. Voss

   Original Investigations Pages: 337 - 343

4. Frequency of the fragile X syndrome in institutionalized mentally retarded females in Japan

   • T. Arinami
   • I. Kondo
   • H. Hamaguchi

   Original Investigations Pages: 344 - 347

5. A study of genetic linkage heterogeneity in adult polycystic kidney disease

   • Stephen T. Reeders
   • Martijn H. Breuning
   • David J. Weatherall

   Original Investigations Pages: 348 - 351

6. Determination of the serological sex-specific (Sxs) antigen (“H-Y antigen”) in birds and mammals using high-titer antisera and a sensitive urease ELISA

   • Mark P. Bradley
   • Cecilia Ebensperger
   • Ulf H. Wiberg

   Original Investigations Pages: 352 - 356

7. Meiotic nondisjunction in oocytes from aged Djungarian hamsters correlates with an alteration in meiosis rate but not in univalent formation

   • Edith Hummler
   • Franz Theuring
   • Ingo Hansmann

   Original Investigations Pages: 357 - 364

8. The fragile site (16)(q22)

   • M. Schmid
   • W. Feichtinger
   • T. Haaf

   Original Investigations Pages: 365 - 368

9. Unsuitability of the assay for cell-mediated lympholysis in inbred mice for H-Y antigen determination of human cells

   • Andreas Braun
   • Hartwig Cleve

   Original Investigations Pages: 369 - 374

10. Confirmation of assignment of the human α1-crystallin gene (CRYA1) to chromosome 21 with regional localization to q22.3

    • James W. Hawkins
    • Margaret L. Van Keuren
    • Fa-Ten Kao

    Original Investigations Pages: 375 - 380

11. Analysis of nucleolar organizing regions in parents of trisomic spontaneous abortions

    • Terry Hassold
    • Patricia A. Jacobs
    • Dorothy Pettay

    Original Investigations Pages: 381 - 384

12. Chromosome analysis of human sperm

    • J. Jenderny
    • G. Röhrborn

    Original Investigations Pages: 385 - 388

13. Growth of large chromosomally abnormal T cell clones in ataxia telangiectasia patients is associated with translocation at 14q11

    • R. J. Hollis
    • A. A. Kennaugh
    • A. M. R. Taylor

    Original Investigations Pages: 389 - 395

14. Maternal origin of a de novo balanced t(21q21q) identified by ets-2 polymorphism

    • Nicole Créau-Goldberg
    • Anne Gegonne
    • Jean de Grouchy

    Short Communication Pages: 396 - 398

15. Constitutional Robertsonian T(15;22) in Ph-positive CML

    • Reinhard Becher
    • Friedrichcarl Wendt
    • Dagmar Kühn

    Case Observed Pages: 399 - 399

16. Announcement

    Announcement Pages: 400 - 400