What is the ratio of offspring by phenotypes from mating parents with the genotypes AABb x aabb?

The AABb individual forms two types of gametes: AB and Ab.
An aabb individual forms one type of gamete: ab.
The result of crossing is: AaBb (two dominant features appear); Aabb (the first is dominant, the second is recessive) – means 1: 1 splitting by phenotype.

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