Atypical inheritance of hemogenetic markers: seven cases of disputed parentage.

The present paper reports seven families with an atypical segregation pattern which we have recently found during paternity testing. In one family, heterozygous mother-child incompatibility (1B2A and 1A2B) in the PGM1 system was observed. This could be explained by an intragenic recombination between the PGM1*1B and PBM1*2A alleles giving rise to the PGM1*2B allele. In the other families, two types of new GC variants with two pairs of double band were identified. These variants (GC*1S1A2 and GC*1F1A2) were presumed to have arisen from the duplication of two GC*1 alleles.