White tigers are not albinos. Some still have an orange tinge to their fur. Their color is due to a defective and recessive gene that is passed from parent to offspring.
White tigers mainly exist in captivity because their color makes survival in the wild difficult due to lack of camouflage. Because the subspecies is perpetuated by inbreeding, genetic defects are common. These include cleft palate, crossed eyes, mental deficiencies and scoliosis of the spine. Some are euthanized at birth due to severe birth defects or lack of the desired white fur color.Learn more about Large Cats