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Narmoush says:

  1. A definition:Tortie Ultra (Contemporary) Persian Cat called "Princess". So this means they actually Persian but with a different type of fur print on their back 'the shell of a TORTOISE'
  2. Tortoiseshells come in many colors:
    • Black tortoiseshells.
    • Chocolate tortoiseshell.
    • Blue [gray] tortoiseshell.
    • Seal tortoiseshell.
    • White tortoiseshell.

Now to get to my point...Are they rare?

Yes,A lot of us know that tortoiseshell cats are always female, with rare exceptions.

Why is this?

Females have two X chromosomes. If a particular female cat is destined to be a tortie she will have received from her parents an X (Eumelanin) chromosome from one parent and an X chromosome (phaeomelanin) from the other. Each cell can have one X Chromosome activated. A factor in the creation of the tortoiseshell coat is controlled by X Chromosome Inactivation. This process only takes place where there are two X Chromosomes; hence only females are tortoiseshell cats. As the cells divide and multiply patches of the two different types of pigment are created.

About 1 in 3,000 tortoiseshell cats are male

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15y ago

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