A great grandparent who was black? I can trace all of my great grandparents.I would think he could too.
I found out just two years ago that I have a black great-grandfather.
No, they’re saying it’s the EQUIVALENT to having a single black great-grandparent.
Actually, as stated prior, that’s only 12%, not 16%.
It might also be stated to be equivalent to 1 great-grand AND 1 great-great-great-grandparent. (12%+3%=15%)
The percentage of African genes is as if 1 great grandparent were African origin. If that 16%were divided among several lines then you would have to go much farther back to find several African ancestors.
No you can't. None of us can. Prior to the development of DNA testing it was not possible to scientifically determine who the father of a baby was.
In DNA testing done in recent years for divorce cases, about 25% of the children are proven to not be the genetic offspring of the mother's husband.
I'm sure this was less common in the past, but I'm also sure it happened. The chance that anybody who claims they can accurately trace their ancestry back many generations is true is statistically very small.