Consider the cross aabb x aabb. if trait a exhibits complete dominance and trait b exhibits codomiance, what phenotypic ratio is expected in the offspring?

6:3:3:2:1:1

Explanation:

If trait A exhibits complete dominance, then the presence of A will always give the phenotype. There are two possible phenotypes with this trait dominant (AA, Aa) or recessive (aa) Since B is codominant with b, there are three possible phenotypes. (BB) dominant, (Bb) blend, (bb) recessive.

The punnet square of the cross is attached. Simply count the possible combinations of phenotypes based on the information above (see colours)

The ratio would therefore be 6:3:3:2:1:1

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