However, some descriptors of cats are not actual breeds. Both tortoiseshell and calico fall into this category. They are not ...

Cats rank among the most cherished pets worldwide, with personalities as lively and diverse as their coat patterns.

The "tiny," one-pound kitten, named Cinder, is a "male tortoiseshell ... "tens of thousands of cat surgeries" throughout her career — and "only seen one other male calico and only a handful ...

A prime example of X inactivation is in the coat-color patterning of tortoiseshell or calico cats (Figure 1). In cats, the fur pigmentation gene is X-linked, and depending on which copy of the X ...

Conversely, calico or tortoiseshell cats are usually female – the female’s extra X chromosome allows the possibility of her receiving both a black and orange gene. 1. https://be.chewy.com ...