Having had my Ancestry.com DNA done turned up a genetic group of Frontier Mormons. This only means a strong connection, not any descent. It reminded me that the original Mormons were largely from the Northeast, and having traced back their own connections for religious reasons are likely to be disproportionately represented among the descendants.
Those who join new religions and head off into the desert are likely to be among the eccentric or even fringe elements of the origin group, and frontier Mormons were certainly an unusual group in their behavior. As New England and New York had already produced the widespread Unitarian heresy, they were perhaps more disposed to believe unusual things. One would expect a selection bias for unusual behavior as well. Which Mormons did display throughout their early history and well into the 20th C. Yet in the 1930's there was an executive decision to switch direction: to shave off the long beards, stop fighting the government and the culture at larger about multiple wives, and become in some sense hyper-American. No culture can manage an about-face like that neatly, and there were schisms and groups which persist to this day that hold deeply to the old Mormon distinctives, even including polygamy.
But the LDS church continues to move away from its distinctives and join a more standard Christianity. Not there yet, but it's coming into view. They can even seem hyper-Christian in areas that mainstream denominations have abandoned. They have the Mormon Tabernacle Choir, not an annual SLC Hip-Hop festival.
I wonder if it is a reassertion of the respectability and conforming genes of Puritans and Dutch Calvinists which populated the Northeast for two centuries. The two generations of converts and pioneers had more eccentricity and adventure genes than the original population, but they were still largely drawn from it and regressed back to it.