Chromosome Research

, Volume 1, Issue 1, pp 69–75 | Cite as

Inverted and satellited Y chromosome in the orangutan (Pongo pygmaeus)

  • Werner Schempp
  • Roland Toder
  • Wolfram Rietschel
  • Frank Grützner
  • Antonia Mayerová
  • Anton Gauckler
Research Papers


An inverted and satellited Y chromosome of almost acrocentric appearance was detected in seven of 14 male orangutans. In the remaining seven animals a submetacentric Y chromosome without NORs occurred. The high frequency with which the satellited Y chromosomes were associated with acrocentric autosomes and the positive AgNO3-staining of their satellite stalks clearly indicate the active state of the NOR on the Y chromosomes. DNA fingerprinting in two orangutan families showed that the inverted and satellited Y chromosomes in carrier orangutan males do not interfere with normal fertility. Within our sample of male orangutans studied, the inverted and satellited Y chromosome is restricted to Sumatran animals; all Bornean specimens possessed the submetacentric Y chromosome. The question arises whether these two kinds of Y chromosome differ constitutively between thePongo pygmaeus subpopulations.

Key words

sex chromosomes Pongo pygmaeus variant Y chromosomes 


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Copyright information

© Rapid Communications of Oxford Ltd 1993

Authors and Affiliations

  • Werner Schempp
    • 1
  • Roland Toder
    • 1
  • Wolfram Rietschel
    • 2
  • Frank Grützner
    • 1
  • Antonia Mayerová
    • 1
  • Anton Gauckler
    • 3
  1. 1.the Institut für Humangenetik und AnthropologieUniversität FreiburgFreiburgGermany
  2. 2.the Zoologisch-botanischer Garten WilhelmaStuttgart-Bad CannstattGermany
  3. 3.the Tiergarten NürnbergNürnbergGermany

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