1. DNA restriction fragment length polymorphisms and heterozygosity in the human genome

   • David N. Cooper
   • Jörg Schmidtke

   Review Articles Pages: 1 - 16

2. Duchenne muscular dystrophy: Pathogenetic aspects and genetic prevention

   • H. Moser

   Review Articles Pages: 17 - 40

3. Maternal ageing and aneuploid embryos—Evidence from the mouse that biological and not chronological age is the important influence

   • J. D. Brook
   • R. G. Gosden
   • A. C. Chandley

   Original Investigations Pages: 41 - 45

4. Isochromosome 6p, a unique chromosomal abnormality in retinoblastoma: Verification by standard staining techniques, new densitometric methods, and somatic cell hybridization

   • Jeremy Squire
   • Robert A. Phillips
   • Brenda L. Gallie

   Original Investigations Pages: 46 - 53

5. Use of a chromosome 21 cloned DNA probe for the analysis of non-disjunction in Down syndrome

   • K. E. Davies
   • K. Harper
   • R. Williamson

   Original Investigations Pages: 54 - 56

6. Bleomycin-induced chromosomal aberrations and sister chromatid exchanges in Down lymphocyte cultures

   • K. Lijima
   • K. Morimoto
   • M. Hirayama

   Original Investigations Pages: 57 - 61

7. G6PD Cagliari: A new low activity glucose 6-phosphate dehydrogenase variant characterized by enhanced intracellular lability

   • A. Morelli
   • U. Benatti
   • A. De Flora

   Original Investigations Pages: 62 - 65

8. A new form of hypertrichosis inherited as an X-linked dominant trait

   • M. A. Macías-Flores
   • D. García-Cruz
   • J. M. Cantu

   Original Investigations Pages: 66 - 70

9. X-inactivation patterns in lymphocytes and skin fibroblasts of three cases of X-autosome translocations with abnormal phenotypes

   • Christine M. Disteche
   • Karen Swisshelm
   • Roberta A. Pagon

   Original Investigations Pages: 71 - 76

10. Cytogenetic studies in spontaneous abortuses

    • T. Andrews
    • W. Dunlop
    • D. F. Roberts

    Original Investigations Pages: 77 - 84

11. Linkage between late onset, dominant spinocerebellar ataxia and HLA

    • Lene Werdelin
    • P. Platz
    • L. U. Lamm

    Original Investigations Pages: 85 - 89

12. Genetic polymorphism of mitochondrial glutamate-oxaloacetate transaminase in Japanese

    • Tasuku Toyomasu
    • Shigeki Sakakibara
    • Hideo Matsumoto

    Original Investigations Pages: 90 - 91

13. Isoelectric focusing studies of human red cell esterase D: Evidence for polymorphic occurrence of a new allele EsD ⁷ in Japanese

    • I. Nishigaki
    • T. Itoh

    Original Investigations Pages: 92 - 95

14. Premature centromere splitting in a presumptive mild form of Roberts syndrome

    • P. Petrinelli
    • A. Antonelli
    • B. Dallapiccola

    Clinical Case Reports Pages: 96 - 99

15. Fragile X “homozygosity” due to somatic crossing-over?

    • R. J. M. Gardner

    Letter to the Editor Pages: 100 - 100

16. Announcements

    Announcement Pages: 101 - 101

17. Announcements

    Announcement Pages: 102 - 102