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

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 ...

6 calico/tortoishell, and 37 nonorange cats. One finding didn't come as a surprise. As long predicted, the mutated gene is ...