Gynandromorphs arise from a genetic error in the chromosomes of the animal. This error results in the organism possessing characteristics of both sexes.
Recently, a gynandromorph moth emerged at the Natural History Museum. One side of the moth had the appearance of a male, the other side had the appearance of a female.
A photograph of a gynandromorph of the Rosy Gypsy Moth (Lymantria mathura).
Photograph by USDA APHIS PPQ Archive, USDA APHIS PPQ, Bugwood.org licensed under Creative Commons.
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