Texas Family Code - FAM § 160.503. Requirements for Genetic Testing

(a) Genetic testing must be of a type reasonably relied on by experts in the field of genetic testing. The testing must be performed in a testing laboratory accredited by:

(b) A specimen used in genetic testing may consist of one or more samples, or a combination of samples, of blood, buccal cells, bone, hair, or other body tissue or fluid. The specimen used in the testing is not required to be of the same kind for each individual undergoing genetic testing.

(c) Based on the ethnic or racial group of an individual, the testing laboratory shall determine the databases from which to select frequencies for use in the calculation of the probability of paternity of the individual. If there is disagreement as to the testing laboratory's choice:

(d) If, after recalculation using a different ethnic or racial group, genetic testing does not rebuttably identify a man as the father of a child under Section 160.505, an individual who has been tested may be required to submit to additional genetic testing.