From: A hierarchical and modular approach to the discovery of robust associations in genome-wide association studies from pooled DNA samples
Allele A
Allele B
Cases (one pool)
n1A = p(A|cases)*(2n1)
n1B = p(B|cases)*(2n1)
2n1
Controls (one pool)
n2A = p(A|controls)*(2n2)
n2B = p(B|controls)*(2n2)
2n2
nA
nB