(A directional transfer of nucleotides from one duplex to another during DNA repair of two homologous genes.) Nonreciprocal exchange of genetic information as a result of heteroduplex formation between non-sister chromatids. Mismatches in the region of the heteroduplex are corrected so that one strand acts as the acceptor, which is made to complement the second strand, the donor (i.e., base changes occur on one strand only, the accptor strand). Disruption of the duplex and subsequent of the donor strand. Heteroduplex formation between allele pairs results in allelic conversion, while heteroduplex formation between nonallelic pairs, due to a high degree of homology, results in interlocus conversion.