Orange and tortoiseshell house cats (torties) have long been an enigma for hair coloration in mammals: now, the genetic basis of their distinctive coat color has been unveiled. Orange isn't the most ...

Add Yahoo as a preferred source to see more of our stories on Google. Calico cat eyes© Michele Walls/Shutterstock.com The post How a Single Genetic Switch Creates Orange, Calico, and Tortoiseshell ...

Editor’s note: Dr. Lee Pickett has retired, but Creators continues to distribute columns from her archives. This one is from 2021. Q: I adopted a calico cat from a shelter that named him Joseph for ...

Calico cats (left) and tortoiseshell cats (right) are the classic example of X chromosome inactivation, where either an orange color or a black color variant of a gene on the X chromosome is active in ...