‘De novo’ trisomy 16q11→pter B. DallapiccolaP. CuratoloP. Balestrazzi Original Investigations Pages: 1 - 6
Recurrence of Down syndrome associated with microchromosome C. RamosL. RiveraA. Sanchez-Cascos Original Investigations Pages: 7 - 10
Heteromorphic X chromosomes in 46,XX males: Evidence for the involvement of X-Y interchange H. J. EvansK. E. BucktonA. D. Carothers Original Investigations Pages: 11 - 31
Confirmation of the assignment of the gene for arylsulfatase A to chromosome 22 using somatic cell hybrids M. C. Hors-CaylaS. HeuertzJ. Frézal Original Investigations Pages: 33 - 39
Effects of alkylating agents on lymphocytes from controls and from patients with Fanconi's anemia Božena NovotnáPetr GoetzNaděžda I. Surkova Original Investigations Pages: 41 - 50
Sister chromatid exchanges in human leukocyte chromosomes: Spontaneous and induced frequencies in early- and late-proliferating cells in vitro B. BeekG. Obe Original Investigations Pages: 51 - 61
Further analysis of the replication bypass model for sister chromatid exchange D. G. Stetka Jr. Original Investigations Pages: 63 - 69
On the incidence of blood group O and Gm(−1) phenotypes in patients with malignant melanoma H. WalterR. BrachtelMaria Hilling Original Investigations Pages: 71 - 81
Progressive myoclonus epilepsy T. F. WienkerG. M. von ReuternH. H. Ropers Original Investigations Pages: 83 - 89
An estimate of genetic risk from 8-methoxypsoralen photochemotherapy B. A. Bridges Original Investigations Pages: 91 - 96
Cytogenetic effects of replicating and nonreplicating strains of influenza virus on male germ cells of mice Menaka A. ThadaniHanumanlu Polasa Original Investigations Pages: 97 - 103
Distribution of glyoxalase I (GLO) variants in Western Europe and the Indian subcontinent Bhaskara R. BusiLinda J. WellsP. Meera Khan Original Investigations Pages: 105 - 113
Concerning the linkage relationships of the Gc and MNSs loci E. A. Chautard-Freire-Maia Letters to the Editors Pages: 115 - 116