Question

Please help with this genetics question:

While examining a young tortoiseshell cat, you and the vet youare interning with get a surprise- the cat is male, not female!From your undergrad genetics course, you recall that tortoiseshellcoats are produced bt the random X-inactivation that takes place inmammilain females. The vet orders a chromosome analysis of the catand finds that he is XXY: he has two X chromosomes and one Ychromosome. Help the vet figure out how a tortoiseshell cat couldbe male. (Hint: Think about X-inactivation in mammals withtwo X chromosomes)