31/10/2026
Orange cats have a genetic story that explains why most of them are male. The gene for orange fur sits on the X chromosome. Females carry two X chromosomes and males carry one X and one Y.
This chart shows two simple examples.
1. A black mother and an orange father: the sons receive the mother's X and are usually black, while the daughters receive one orange X and one black X, which creates a tortoiseshell coat.
2. An orange mother and a black father: the sons are usually orange, and the daughters are tortoiseshell or calico.
Calico is a tortoiseshell coat with added white spotting. Because a female needs two copies of the orange gene to be fully orange, orange females are less common. Estimates often say around three out of four orange cats are male.
This is a simplified overview. Real litters vary, and coat patterns depend on several genes.
