Why are they called ‘calico’ cats? | TheUnion.com
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Why are they called ‘calico’ cats?

Calico cats are not a specific breed of cat. The name generally refers to cats that are primarily white but also have patches of other colors to distinguish themselves, such as orange and black fur. Most calicos are at least two-thirds white.

Tortoise-shell cats are similar to calicos but have little or no white fur. “Dilute” calicos are primarily white, but have patches of blue and cream.

Calicos are predominately female because of the genetic code that accounts for orange and black colors. The gene for fur color appears on the X chromosome. Therefore, female calicos need two X chromosomes, which usually gives them XX chromosomes. This should result in a female cat. The Y chromosome does not contain any coding for fur color. Since males are XY and not XX, few calicos are male.



Source: http://www.best-cat-art-com/calico-cats.html


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