Hello everyone thank you for having me. This is my first post though I have read many. My question is regarding the genetic trending effect that the RH negative blood factor may have had on ancient people, primarily so called "caucasions" since the factor is almost exclusive to those of European descent. The RH factor is indicative of whether or not you carry a gene in common with the Rhesus monkey. 90% of the worlds population has the gene, 10 percent of us don't have it. Hemolytic Disease occurs when and an RH negative woman becomes pregnant with a child from an RH positive father. The womans body will have a tendency to attack the fetus as a foriegn species and very often aborts the child all together. RH negative men however, can have children with either. The only other place in nature that this occurs is in Mules, a hybrid of a donkey and a horse. Also, only RH positive people can be cloned, RH negs cannot. Oddly enough RH positive blood is most common in the Basques, the Irish and the Scots, I believe in that order. I had also read that there was a high occurance in Haplogroup I though I cannot verify the source on that one. I am both RH Negative and Haplogroup I M-170. Hence my curiosity. I believe it's possible that since we know Haplogroup (I) is associated with Cromags, that they would have had the most contact with Neanderthals of all people. Could this RH negative factor be evidence of a Neanderthal-Cromag hybridization? Think of the possible religious and separatist effects this would have on an early RH negative tribe. Thier women could not get pregnant by foriegn invaders and the men could impregnate any of the invader's women. Would this lead you to believe you were a chosen people? In many religions it is the female line that passes the faith on to her children, could the RH negative factor be why? Some of these resulting societal and religious patterns could be 40,000 year old culture for all we know. The Basques, Irish and Scots have been called clannish by nature. I am no expert on the subject, just intrigued. And a horrible speller...lol Must be the Neanderthal in me..