Figure 1

Scatter plots representing the Log R ratio (LRR- y axis) and the B allele frequency (BAF- x axis). On the left panel, classical pattern with two clusters for a SNP segregating in the 1/2: 1/2 ratio (one homozygous class and one heterozygous class). On the right panel, classical pattern with three clusters for a SNP segregating in the 1/4: 1/2: 1/4 ratio (two homozygous classes and one heterozygous class).