Genetics of the White Tiger
White Tigers can ONLY exist in captivity by continual inbreeding, such as father to daughter, brother to sister, mother to son and so forth. This is because the white color is the result of a double recessive allele (gene) and thus the white color can only be produced by inbreeding one tiger carrying the recessive gene for the white color to another tiger carrying the same recessive gene. Before the five remaining species of tigers were pushed to the brink of extinction by the activities of humans, the random occurrence of one normal colored tiger carrying the recessive gene for the white color breeding to another normal colored tiger also carrying the recessive gene for white color, thus producing one or possibly two cubs possessing the double allele for the white color and consequently being born white, occurred about once in every 10,000 births. That statistical approximation is based upon recorded observations in the wild of white cubs. It should be noted that the first recorded observation of a white cub was made in the mid-fifteenth century and the only wild observations of white cubs have been in Bengal tigers.
Because the white coloration is so disadvantageous to survival there is no recorded evidence of a white cub ever living long enough in the wild to become an adult. That is why white tigers ONLY exist in captivity and then ONLY as the result of continual, destructive and unethical inbreeding. Thus, the concept of the "Royal Rare White Bengal Tiger" is a myth and likely the most deceptive misconception and most destructive conservation fraud ever perpetrated on the American public. The truth is that all the white tigers currently in the United States are not even Bengal tigers but are worthless hybrids or crossbreds originating from normal colored offspring born to a pure Siberian male tiger and a pure Bengal female tiger that were kept together during the 1960's at the Sioux Falls, S.D. Zoo. Unknown to the Zoo at that time or to the two private exhibitors who purchased cubs from two litters born at the Zoo, all the normal colored cubs carried the recessive gene for the white color because either or both their Siberian father or their Bengal mother was a or were random carriers of the recessive mutant gene. Thus when the two private exhibitors that purchased litter mates from the Sioux Falls Zoo unethically bred brother to sister, the recessive mutant genes were paired, producing one or two white tigers.