Cats
Unless a way can be found to undo X-
linked inactivation at the embryo stage, owners wishing to clone a tortoiseshell cat will have
to settle for a cat of a different colour entirely. If the X-linked inactivation can be reset, the
inactivation is a random process so the clone will have the right colours, but not in the same
places as the donor cat - it may have well-defined patches of colour while the donor cat was
thoroughly brindled.
TRI-COLOUR BENGALS
Confusingly for cat lovers, tri-colour Bengals are not tortoiseshell cats. In the Bengal breed,
tri-colour refers to a cat with black rosettes on a golden brown background. The centre of the
rosette is generally a darker version of the background colour, hence the cat has three colours:
pale background, black markings, dark rosette centre.
Tortoiseshell Bengal variants have occurred during breed development, but it is not an
accepted colour in a breed which aims to re-create a wild look.
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