He took some major liberties there with the idea of Mitochondrial Eve and Y-chromosome Adam. We inherited her mitochondrial genes, largely due to the nature of mitochondrial inheritance in that it is particularly susceptible to genetic drift. To say that no other women left their genes in the population and that only two people gave rise to everyone today, the way the bible says that it does is a gross misstatement of the facts. Consider that Y-chromosome Adam lived some 50,000 years after Mitochondrial Eve.
Mitochondrial Eve - Wikipedia, the free encyclopedia
Y-chromosomal Adam - Wikipedia, the free encyclopedia