Table 1. Genotype distribution at a diallelic marker in a case-control study.

	Genotype*
Phenotype	aa	Aa	AA	Total
Cases	r 0	r 1	r 2	R
Controls	s 0	s 1	s 2	S
Total	n 0	n 1	n 2	N

* A denotes the minor allele across the paper.