Human Genetics

, Volume 80, Issue 3, pp 301–303 | Cite as

X-Y crossing over in the chimpanzee

  • Bernhard Weber
  • Jean Weissenbach
  • Werner Schempp
Short Communications


Single-copy DNA sequences defining several pseudoautosomal loci on the human sex chromosomes are shown to be highly conserved in the genome of the chimpanzee. Segregation analysis of polymorphic pseudoautosomal probes in a chimpanzee pedigree revealed that the transmission of the paternal alleles was not strictly sex-linked. In situ hybridization localized the pseudoautosomal probe 29C1 specifically to Xp22-Xpter and to Yq12.2-Yqter on the chimpanzee sex chromosomes. Thus, our results demonstrate the existence of homologous segments on the chimpanzee X and Y chromosomes, which regularly undergo recombinatory exchange in male meiosis. The chimpanzee is now the third mammalian species, besides man and mouse, in which there is genetic evidence for a pseudoautosomal segment on the sex chromosomes.


Internal Medicine Metabolic Disease Mammalian Species Segregation Analysis Genetic Evidence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • Bernhard Weber
    • 1
    • 2
  • Jean Weissenbach
    • 2
  • Werner Schempp
    • 1
  1. 1.Institut für Humangenetik und Anthropologie der UniversitätFreiburg i.Br.Federal Republic of Germany
  2. 2.Unité de Recombinaison et Expression Génétique, INSERM U. 163, CNRS LA 271Institut PasteurParisFrance

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