Ethnicity is not genetic. It just isn’t. Ethnicity is a term referring to groups that consider themselves a certain “people,” usually due to some shared cultural feature, such as geography, language, religion, ancestry, etc. because of this, it is possible for one ethnic group to split into new ethnic groups, it is possible for several ethnic groups to merge into one ethnic group. The process of forming new ethnic groups is called ethnogenesis. Attempting to determine ethnicity via blood testing is essentially making a best guess based off of ancestry and genetic markers that crop up because ethnic groups tend to be fairly endogamous, but the genetics to not define the groups.









