Questionis it genetically possible for the child of a white parent and a black parent to look completely white (blond hair, blue eyes, etc.)?
AnswerTheoretically, yes, if the black parent has some white in their ancestry. In fact, it's been known for two black parents to have a white child, when lurking recessive genes from both parents come together.
Another possibility is albinism, which in a dark-skinned person can cause them to look merely white and blond and blue-eyed, rather than the ghostly look that caucasian albinos have.