In the creeping vole (Microtus oregoni) females are XO and males are XX. The offspring always get an X from their father, but their mother gives either an X or nothing.

This only works because their X chromosome carries some of the information that the Y carries in other species.

There is also a clever bit of coding that in most mammals causes less expression of the genes on the X chromosome in females (so that females don't have twice as many proteins running around their body.) And in creeping voles it only does so in males.

Creeping Vole Sex Determination