Patched tabbies and tortoiseshells are almost always female. The combination of red and non-red colors only appears when the female cat has one dominant "O" gene and one recessive "o" gene attached to her X chromosomes. If the female were to have two dominant "O" genes present, she would be a red cat of some type. Having two "O" genes present on the X chromosomes does not mean there are no black genes in the cat's gene pool. Every cat has a pair of black pigment genes. The color is simply not visible in the presence of two overriding red genes.

B L A C K		Patched Black Tabby + Orange gene (0)
		Tortie Black Solid + Orange gene (0)

B L U E		Patched Blue Tabby + Orange gene (0)
		Tortie Blue Solid + Orange gene (0)

C H O C O L A T E		Patched Chocolate Tabby + Orange gene (0)
		Tortie Chocolate Solid + Orange gene (0)

L I L A C		Patched Lilac Tabby + Orange gene (0)
		Tortie Lilac Solid + Orange gene (0)

C I N N A M O N		Patched Cinnamon Tabby + Orange gene (0)
		Tortie Cinnamon Solid + Orange gene (0)

F A W N		Patched Fawn Tabby + Orange gene (0)
		Tortie Fawn Solid + Orange gene (0)