The June 27th Reasons to Believe e-mail, sent out by the organisation Reasons to Believe says the following:

Genetic studies to date of DNA taken from representatives of different population groups demonstrate that humanity had a recent origin from a single location. These studies also indicate that humanity's original population size was small and that all of humanity traces back to a single woman, called mitochondrial Eve, and a single man, called Y-chromosomal Adam. Genetic data also affirms that humanity expanded from near the Middle East to populate the globe. These insights square with the biblical account of humanity's origin. New research examines the genetic variation of Asian and Australasian people groups and confirms the primeval migrational pattern of humanity from near the Middle East into Asia and Australia. This new work shows rapid human migration along the southern coast of the Middle East through India and other parts of Asia. As anthropologists study human genetic variation, the biblical description of human origins continues to gain support.

Here are two of their sources:

• Vincent Macauly et al., "Single, Rapid Coastal Settlement of Asia Revealed by Analysis of Complete Mitochondrial Genomes," Science 308 (2005): 1034-36.
• Kumarasamy Thangaraj et al., "Reconstructing the Origin of Andaman Islanders," Science 308 (2005): 996.

You can look for further information on this and other evidence that the Biblical Account of origins is accurate on the Reasons to Believe website. I highly recommend that you sign up for their Reasons to Believe (amost) daily e-mail.