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Expected segregation ratios associated with 6 different genetic models that assumed independent assortment or epistasis without linkage.
| Model assumption | Genetic model | Segregation ratio |
|---|---|---|
| Independent assortment | Single gene | 1:1 |
| Two additive genes | 3:1 | |
| Epistasis | Function in 2 genes | 1:3 |
| Function in 3 genes | 1:7 | |
| Three genes possible, either a functional gene A or functional genes B and C | 5:3 | |
| Three genes possible, a functional gene A is required and either a functional gene B or C | 3:5 |
