If zooids were transected at the middle level between the branchial and atrial apertures. Double posterior regenerates were produced from the posterior halves, with the reversal of the antero-posterior (A-P) axis in the regenerated region. If the double posterior regenerates were re-transected at the middle level, the halves with the new posterior part formed zooids with the reversed bilateral asymmetry.
In order to apply the leukocyte HLA groups for paternity testing, a table was devised for the calculation of the likelihood of paternity from the phenotype combination of the mother, the child, and the putative father.