Autosomal DNA
In autosomal DNA one set of chromosomes 1-22 comes from the mother, while the other set comes from the father. These two sets are recombined in an unbiased, random, and uncontrollable fashion. Autosomal DNA testing is the most common commercial DNA test and it can constrain a relationship within a limited number of generations in the past, typically 5-6 generations, refer to attached graphics and simulated model by HAPI-DNA Tools. Outisde that constraint an autosomal DNA relationship is still possible but normally not traceable in the same sense.