From surveys of markers in Jewish cemeteries, about 5% of Jewish men have historically been Cohanim. Genetic research indicates that many Jewish men who self-identify as Cohanim belong to the Y-chromosome DNA lineage that is most common in the Cohanim. That is, they belong to the Cohanim Modal Haplotype (CMH). Further, in a study conducted in Israel where men were asked at random if they were Cohanim, Levite, or Israel, of those answering Israel, about 3% when tested were part of the CMH lineage.