I posted this in another topic:
Both mother and daughter had black hair. That is a dominant. Dwayne Johnson is black and Samoan. His coloring is more white than black, though certainly not cliche white.
A black and white parent are more likely to have children with a mixture of characteristics from both parents; skin likely brown, hair dark, eyes dark. Features can run the gamut. However, it is entirely possible for a child to appear completely black or completely white.
The classic experiment (which is simplistic, but illustrates the point) is a black mouse and a white mouse. (by which we are referring to their hair color). If they have 4 offspring, the probabilities (which are not definitively what will happen) is one completely white mouse, one completely black mouse and two mottled black and white.
As I noted above, both mother and daughter had black hair. I believe their eyes were dark, though it has been awhile since I've seen the movie. So, this is a likely scenario.
If the daughter had blonde hair, that would be a genetic issue. (though if Dwayne's character had any blonde haired ancestors, even one, the recessives could combine to blonde hair.)
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