I can do no better here, than to refer you to the talk Thabiti gave at Together For the Gospel 2008 (where me and Dayper went).
The mp3 can be found here:
Whilst its downloading you might want to read this, from the ESV study Bible article on race:
Recent genetic studies from the Human Genome Project give interesting confirmation to the very large degree of genetic similarity shared by all human beings and the extremely small degree of genetic dissimilarity distinguishing one people group from another. The best of contemporary science shows that the human genome sequence is almost exactly the same (99.9%) in all people. In fact,
DNA studies do not indicate that separate classifiable subspecies (races) exist within modern humans. While different genes for physical traits such as skin and hair color can be identified between individuals,
no consistent patterns of genes across the human genome exist to distinguish one race from another.
There also is
no genetic basis for divisions of human ethnicity.
People who have lived in the same geographic region for many generations may have some alleles [possible forms in which a gene for a specific trait can occur] in common, but no allele will be found in all members of one population and in no members of any other.
Why then do people with different racial characteristics originate from different regions of the world? The human race, starting with Adam and Eve, has always included not only genetic variations of eye color, height, and facial appearance, but also of skin and hair color now associated with different racial groups. At some early point when people began migrating to various parts of the earth, some variations within the one human gene pool became geographically isolated from other variations, so that people living in what is now northern Europe came to look more like each other and different from people living in what is now Africa, or Asia, or North America.
Another interesting implication of this has to do with genetic inheritance of skin color. Modern genetic studies show that when a lighter-skin person has a child with a darker-skin person, none of their children will have skin darker than that of the darkest parent. This means that if the hereditary transfer of skin color has operated in the same way from the beginning of human history, then the genetic variety in skin color (which is a very tiny difference from the standpoint of human genetics) must have existed from the very beginning. This suggests that Adam and Eve's children (see Gen. 5:4) would have likely had different skin colors, and that Adam and Eve would have likely had different skin colors as well.