I am not a geneticist or anything but as an avid genealogist I got my DNA tested with Family Tree DNA of Houston Texas. They are the largest DNA lab and have the largest current database. There are over 5,000 different studies going on that cover surnames, ethnicity and geographical sample groups.
They are working with the National Geographic Human Genome and Migration study based at the University of Arizona. According to them, there are Indians from the East coast of North America who exhibit European haplotypes even though their genealogical or historical documentation show no late generation mingling with European settlers. I believe in particular, the Chippewa and Ojibway have been mentioned as having a higher incidence of this characteristic.
There was a program on the History Channel called “10,000 BC”, which studied this Ice Age migration from Western Europe. I won’t disagree with scientists who specialize in genetics but I do question the contradictory nature of this study when there are others currently ongoing that seem to indicate the possibility that North America was settled by two different groups from both East and West. The genes don’t lie, and if an individual’s genetic information cannot be connected to someone in recorded memory then the ancestor goes further back than the modern period of European settlement.
It has been very enlightening to know ones own Haplogroup and Haplotype but it has also been a great dissappointment to some when their genetic signature is not what they were expecting! The bottom line is that the scientific community seems to agree that humanity originated in Africa and the path of genetic migration seems to have confirmed that theory. We all owe our existence to wandering bands of hunter gatherers who ventured out of Africa and covered the globe.