Orange and tortoiseshell house cats (torties) have long been an enigma for hair coloration in mammals: now, the genetic basis ...

Now, two studies have finally identified the genetic key to this mystery, solving a puzzle first theorized in 1912. The studies, conducted independently by Japanese and American research teams, have ...

For all other animals, including redheaded humans, we know what causes this characteristic color ... this generates a tricolor cat, commonly known as a calico. Each calico is unique, as the ...

Both tortoiseshell and calico fall into this category. They are not actual breeds of cats but rather are ways to describe the ...

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 ...