Balanced translocation (10;13) in a father, ascertained through the study of meiosis in semen, and partial trisomy 10q in his son. Characterization of the region responsible for the partial trisomy 10q syndrome.

We describe a reciprocal translocation (10;13) in a man, ascertained through the study of meiosis in semen, and a partial trisomy 10q in his abnormal son. The phenotypic anomalies of the partial 10q trisomy syndrome are probably due to the presence in triplicate of the region q25 = to qter of chromosome 10.