The recombination event between SNPs rs2532924 and rs3095089 (SNP5 and SNP6) could be deduced from data of the two parents and the three children (C1 to C3). It is clear that all three children share the maternal allele IBD for rs2532924. Since C1 and C2 also share the maternal allele for rs3095089 IBD, but not C3, one can deduce that a recombination event occurred between the two SNPs for the maternal meiosis of C3. If the data for C1 were not available, one could still deduce that a recombination event occurred in either C2 or C3, but assigning it to a specific child would not be possible. If neither C1 nor C2 were genotyped, the recombination event could not be inferred using traditional approaches without genotyping the maternal grandparents.
