Freemartinism in a captive herd of Rocky Mountain bighorn sheep (Ovis canadensis).
Freemartinism in two animals from a captive herd of Rocky Mountain bighorn sheep (Ovis canadensis) at the Denver Zoological Gardens (Denver, Colorado, USA) is described. A young ewe had female external genitalia, a masculine appearance, and demonstrated male behavior as she matured. Another ewe with female external genitalia died as a yearling. Necropsy revealed a non-patent vagina and internal male genitalia. Both females were chimeric with karyotypes containing XX and XY sex chromosomes.
Kenny
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Denver Zoological Gardens, City Park, Colorado 80205.
Cambre
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Frahm
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Bunch
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D000818:Animals; D000836:Animals, Zoo; D002678:Chimera; D005260:Female; D005611:Freemartinism / Q000235:genetics / Q000473:pathology*; D007621:Karyotyping / Q000662:veterinary; D008297:Male; D012730:Sex Chromosomes; D012756:Sheep; D012757:Sheep Diseases / Q000235:genetics / Q000473:pathology*