The notion that Christ's DNA is different from that of other humans is a new one for me, and I suspect that Christian orthodoxy would find it heretical. Regardless, the question is: Is Christ genuinely human, or a quasi-human mutant? Christian orthodoxy insists that he is genuinely human, and that he never sinned. Catholics, Eastern Orthodox, and Oriental Orthodox -- indisputably the majority of Christians -- also teach that his mother never sinned. So from the point of view of Christian orthodoxy, Paul's statement that all have sinned can only be true in general terms, and certainly cannot mean that all humans, without exception, have sinned.