Kohanim

Essential laws for the Three Weeks period - guidance from Rabbi Ovadia Yosef's rulings

When Israel left Egypt, Aaron, brother of Moses, was the sole priest from the tribe of Levi. The priesthood passes from father to son, but there's more to the story.

A genetic study finds a common gene among Kohanim, spanning Ashkenazi, Sephardi, and other Jewish communities. 70-80% share this gene, unlike any other population.