[x]

Obama's half-brother also doesn't look much like Barack Sr.:

Maybe he's somebody else's child as well, but when parents from different races get together the children don't show some of those physical characteristics that predominate in one race or the other.

Barack Sr. has a physical appearance that's very common among the Lao people. His half-White kids aren't going to have those characteristics.

[Fred Nerks]

He's his father's son, his mother Ruth had the birth certificate to prove it and Mark inherited, while the children of Kezia DIDN'T.