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Physical and behavioral findings in a pseudohermaphrodite American bison
D F Lott1, K Benirschke, J N McDonald
1Department of Wildlife and Fisheries Biology, University of California, Davis 95616.
Abstract:
A pseudohermaphrodite American bison (Bison bison) behaved like an adult male when interacting with adult females, but like an adult female when interacting with adult males. Its chromosomes were a normal 60, XX and it had a uterus; but it had bilateral testes rather than ovaries. Skull measurements were intermediate between a bull and a cow. Gonadotrophin levels were typical of ovariectomized domestic cows or steers.
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