IMO, this is an extremely important finding:
Quote:
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Examining the same Y-chromosome and mitochondrial DNA markers used in other genetic studies, these 131,060 Icelanders revealed highly skewed distributions of descendants to ancestors, with the vast majority of potential ancestors contributing one or no descendants and a minority of ancestors contributing large numbers of descendants.6 In other words, the majority of people living today in Iceland had ancestors living only 150 years ago that could not be detected based on the Y-chromosome and mitochondrial DNA tests being performed yet the genealogical records exist showing that these people lived and were real ancestors. To the point at hand, if many documented ancestors of 150 years ago cannot be seen with Y-chromosome and mitochondrial DNA tests from modern Iceland, then the possibility can exist for people that are reported in the Book of Mormon to have migrated to the Americas over 2600 years ago and yet not have detectable genetic signatures today.
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http://farms.byu.edu/publications/dn...NA_Feb2006.php