Adam, Eve and ?

If god only created two people their children would have to reproduce with eachother. causes DNA mutation. There were these group of people in the Appalachian Mountains called the "Blue Fugates" that were so inbreed their skin turned blue (a href="http://en.wikipedia.org/wiki/Methemoglobinemia)." rel="nofollow"http://en.wikipedia.org/wiki/Methemoglob…/a So do you really think the whole population was created by just two people?