It does appear the fossil evidences support both Adam and Eve is the common ancestor going back to Africa. I'm in agreement with Percy that the evolution theory says there is no evidence of a first human "meaning" an (Adam an Eve). The creationists theory disagrees with what the evolutionary theory actually says based on scientific evidences. The scientific evidence of Mitochondrial Eve or Chromosomal Adam goes contrary to the evolution theorists beliefs.
The Iraq dispersion of the human race occurring after the flood, is in agreement with the African origin of the human race (Adam and Eve).
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Locating "Adam" and "Eve"
The rate at which polymorphisms develop though generations is known. Scientists can determine the number of polymorphisms in a certain population, as well as how many polymorphisms exist between different populations. In 1987, Mark Stoneking and Allan Wilson at the University of California, Berkeley, announced they had tracked down mitochondrial "Eve". By examining polymorphisms contained in the mitochondria, they were able to construct a global family tree. At its top branch was a woman who lived in Africa many years ago.
The next place to start looking for patterns of heredity was on the Y chromosome. Y chromosomal "Adam," the ancestor of all men, was determined in 1997. Two different research groups, led by Peter Underhill at Stanford University and Mike Hammer at the University of Arizona, each announced that Y chromosomal "Adam" had also lived in Africa many years ago. This is the most recent common male ancestor to all men in the world.
http://www.freemaninstitute.com/RTGdna.htm