I simply stated that such a statement is nothing but supposition and there is no evidence (not even in the Bible) that Adam and Eve had higher genetic diversity, nor that "sin" would adversely effect genes.However according to the Biblical account, when God made the world and Adam & Eve, everything was perfect. So we have two physically perfect humans with no genetic defects whatsoever plus a much higher genetic diversity (number of genes) than we see today. Now of course after sin entered the world this also effected our genes as well...
I also questioned the "perfect creation" by wondering if Adam and Eve, before the fall, still had eyes that had to flip images around before sending that information to the brain, thus causing a blind spot, . . . or having a tube for both breathing and swallowing, causing a choking hazard.
The main topic of the post had to do with why Adam and Eve's offspring could have sex with each other, "since there were no other humans elsewhere, being that we all came from that original pair"....
They have no proof that Cain or Seth took their sisters for their wives. More supposition with no credibility. Yet my post gets deleted.