The ONLY way to produce a tiger or lion with a white coat is through inbreeding brother to sister or father to daughter; generation after generation after generation. The kind of severe inbreeding that is required to produce the mutation of a white coat also causes a number of other defects in these big cats.
A. Those little bumps are caused by keratosis pilaris, a common skin condition that usually affects the arms and thighs (although it sometimes appears on the buttocks and face, too). It's caused by a buildup of the protein keratin, which can plug a hair follicle, resulting in a bump.
The slightest bump of the body against an object can cause bruising among people who do not have an adequate layer of body fat. This is the most common cause of easy bruising in the very young or very old. These are ages where a person's body fat is just starting to develop or is already thinning out.