There are 2-3 organizations doing DNA identification in Qingdao, all of which have identification qualifications.

The result of DNA identification is generally the comparison of 24 loci. If it is a biological relationship, half of each locus comes from the father and half from the mother.

If a locus cannot be matched, it is necessary to determine whether there is a possibility of gene mutation.

If there is no possibility of gene mutation, it is not a biological relationship.