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A Tortoiseshell cat is a type of cat, the coat of which consists of two of the fur colours black, brown and orange.

It is a possible corporeal form of the Patronus Charm.[1]

Behind the scenes

The tortoiseshell colouring is possible because the genes for black fur, for brown fur and for orange fur are co-dominant and occupy the same position on the X chromosome. This is why there are no occurrences of all three (except perhaps in XXX females) and why nearly all torties are female (the rare exceptions being XXY males).

Appearances

Notes and references

  1. (see this image)
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