There's another poster on here who seems to seems to have an extremely in-depth knowledge of every theory about Obama's parentage and who has ruled out Frank Marshall Davis. Looking at pictures of Davis and also a known son of Davis, he points to the fact that they both have receding chins, which Obama does not.
BTW it pretty questionable whether that is a photo of Ann Dunham, as you probably know.
No I didn't know that.
But if it is, her 'strong chin' would explain Barry's.
In any case I don't think Barry looks like Barack Sr.