I wrote a research paper on this topic for my Theology masters. Here’s an exert that may help you:
A recent development in this field of genetics involves the tracing of the male Y-chromosome and the female mitochondrial DNA. Scientists can re-trace branches of ancestry of multiple cultures and races and determine when and where the branches “came together” to a common past parent. Earlier research had resulted in finding a common male “father” for the entire human race somewhere in the time-frame of 50,000 to 115,000 years ago and a common female “mother” in the time-frame of 150,000 to 240,000 years ago. Scientists struggled to theorize how the common “mother” and “father” could live tens of thousands of years apart. Interestingly, the geneticists gave their original male and female the names “Y Chromosome Adam” and “Mitochondrial Eve”. The most recent advancement in genome research was presented in August of 2013 in the professional journal “Science”. A world-wide sampling of DNA from 69 men resulted in the refining of the estimated life of “Y Chromosome Adam” to between 120,000 to 156,000 years ago. Consequently the best estimates of today’s geneticists point to a striking possibility that “Y Chromosome Adam” and “Mitochondrial Eve” were indeed contemporaries. Although these amazing findings receive scarce attention from secular culture and academia, they clearly refute the popular notion of polygenism and vindicate Pope Pius XII’s teaching in “Humani Generis” and indeed the ancient teaching of the Genesis text itself.
Reference: Erin Wayman, “Y chromosome analysis moves Adam closer to Eve, Genetic studies push back age of men’s most recent common ancestor”, Science News (7 September 2013), online edition:
sciencenews.org/article/y-chromosome-analysis-moves-adam-closer-eve, assessed 17 November 2013.