Or, as Fred Clark notes herein:
'I appreciate the concern and the intent of stuff like this, but I think it’s possible to make sense of the book of Romans without resorting to hallucinogenic science and delirious theology that ponders the “genetic” spread of sin.'
Please stop looking for the ‘original sin’ gene
Think Christian has been running a mini-forum on the question of a “historical Adam.” Dennis Venema’s contribution was quite helpful for squarely stating that science finds the idea of a single “Adam and Eve” couple as the ancestors of all of humanity to be extremely, and increasingly, unlikely. I liked Venema’s piece a lot, particularly this bit: Some Christian groups are beginning to require denying these findings as part of their theology. In …

The way to reconcile religion and science: The former is 100% allegorical.
101% if you allow for the uncertainty principle ;D
I don't know that I'd say 100%. But 80-90%? I could go there.