[Forensic use of polymorphism St 14.1]

The DNA-fragment (St 14.1) from the human X-chromosome recognizes a series of approximately 10 alleles after Taq I digestion. The presence of constant bands simplifies the assignment of the alleles to a definite Kb-size when small differences exist between the alleles. 348 individuals were investigated and included 120 mother/child combinations. The verification of the Hardy-Weinberg equilibrium gave a value of 32 in the chi square test by 20 degrees of freedom and therefore a P-value of 95-97.5. The allele frequencies range from 1%-40% with an expected exclusion rate of 77.3% (for mother/daughter combinations).