Table 1.
Possible groupings of phenotype values by the genotypes of Xi and (XiXj)
| Xi = 1 | Xi = 0 |
|---|---|
| group A | group B |
| (a) Grouping of Y by Xi | |
| Xi = 1 | Xi = 0 | |
|---|---|---|
| Xj = 1 | group a1 | group b1 |
| Xj = 0 | group a2 | group b2 |
| (b) Grouping of Y by XiXj | ||
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