Skittles is a two-to-three-year-old female, tortoise-shell calico cat. She was found on the 300 block of South John Street. The rescue says she’s a friendly and outgoing cat that gets along well ...

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 ...