Assuming independent assortment, the ratio of progeny with the genotypes AaBb : Aabb : aaBb : aabb from a dihybrid cross AabB X AaBb will respectively be:
1. | 4 : 3 : 2 : 1 | 2. | 4 : 4 : 2 : 1 |
3. | 4 : 2 : 2 : 1 | 4. | 4 : 2 : 1 : 1 |
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