Is this a male, or a female #cat? A female! This coat coloring, which combine two colors other than white (black and red in this case), is known as #tortoiseshell, and it is found almost exclusively in female cats. This is because the X chromosome determines the color of the cat, and there are no color genes in Y chromosome. Thus, female cats with XX #chromosomes may be three colored (including white), while male cats with XY chromosomes cannot.