Genetic testing and sequencing technologies

We are 50% our DNA and 50% our environment, but sometimes the genealogy trees and genetics tests don't matches (adoption hidden somewhere in the tree, infidelity, separation during the war, non-recognition, human chimera, etc.). After twenty years of personal practice in genealogy (and some big surprises with my own DNA and parents identities...), I help people to trace their genealogical links based on the genetic (Mitochondrial DNA; Y-DNA; autosomal DNA; archaic DNA; etc.) from raw data.