I think that most Conservatives (judging only by the people I personally know) actually fall into Camp #3 here. It’s as easy to adhere to a Biblical worldview as it is to adhere to a Rationalist worldview, but both are equally wrong.
Defining “personhood” in the way the Mississippi resolution does is wrong in every meaningful way. The underlying tragedy is that that the human experience underling the science is inaccessible to the zealots pushing the measure.
http://digbysblog.blogspot.com/2011/11/irrelevant-science-of-eggs-and-embryos.html