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  1. Article

    Open Access

    The multiple sex chromosomes of platypus and echidna are not completely identical and several share homology with the avian Z

    Sex-determining systems have evolved independently in vertebrates. Placental mammals and marsupials have an XY system, birds have a ZW system. Reptiles and amphibians have different systems, including temperat...

    Willem Rens, Patricia CM O'Brien, Frank Grützner, Oliver Clarke in Genome Biology (2007)

  2. Article

    Open Access

    Disruption and pseudoautosomal localization of the major histocompatibility complex in monotremes

    The monotremes, represented by the duck-billed platypus and the echidnas, are the most divergent species within mammals, featuring a flamboyant mix of reptilian, mammalian and specialized characteristics. To u...

    Juliane C Dohm, Enkhjargal Tsend-Ayush, Richard Reinhardt, Frank Grützner in Genome Biology (2007)