Linkage disequilibrium and LOD score 1. Gene A has two alleles, A1 and A2. Gene B has two alleles, B1 and B2. In a population, the following haplotype frequencies were observed: A1B1 = 0.2, A2B2 = 0.45, A1B2 = 0.15 and A2B1 = 0.2. Calculate the extent of linkage disequilibrium. […]