Industry wide, paternity tests are generated using as few as four markers, to as many as 16 markers. Chromosomal Laboratories routinely uses a 16 marker test that can achieve a probability of > 99.999%. Should a complex case arise, Chromosomal Laboratories can test an additional 5 markers, for a total of 21 genetic markers. The primary difference between a legal and private test is how the samples are collected; the laboratory testing itself is the same.
