The study of difference and the tracing of genetic lineage was a legitimate subject of inquiry.

These recent studies have also found that the European populations fall into two major genetic lineages; an Eastern and a Western type.

In the Ice Age, differentiation into two genetic lineages occurred.

The genetic lineage is probably mixed as is the whole of Lebanon.

The variants in shared ancestral species is said to be due to multiple genetic lineages.

Admixture results in the introduction of new genetic lineages into a population.

In contrast, most maternal genetic lineages seem to descend from hunter-gatherers.

According to Moffat, there is a larger and unrelated genetic lineage of men with the same surname.

There have been suggestions that some genetic lineages found in the Middle East arrived there during this period.

But the study also suggests that there may be other reasons why humans and Neanderthals share ancient genetic lineages.