Why sometimes tigers are born with white fur?

There is an opinion that in the nature there are some albino tigers, however thats a false opinion. White fur with black stripes and blue eyes occurs only in Bengal tigers due to mutation of their genes, the probability of mutation is 1 to 10,000. White tigers are reproducing very well in unnatural habitats, nowadays in the zoos around the world there are around 100 white tigers, and all of them are descendants of 1 tiger that was found by hunters in 1951.


SOURCE: http://en.wikipedia.org/wiki/Tiger
IMAGE: http://afunnyanimal.blogspot.com/2011/08/white-tiger-pictures.html