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Consider the cross AaBb AaBb. If trait ' A ' exhibits complete dominance and trait ' B ' exhibits co-dominance what phenotypic ratio is expected in the progeny ?

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An Intiative by Sri Chaitanya

3 : 6 : 3 : 1 : 2 : 1

9 : 3 : 3 : 1

1 : 2 : 1 : 2 : 4 : 2 : 1 : 2 : 1

1 : 1 : 1 : 1

answer is A.

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Detailed Solution

Consider the cross AaBb AaBb. If trait ' A ' exhibits complete dominance and trait ' B ' exhibits co-dominance the phenotypic ratio expected in the progeny is

Phenotypic Ratio of complete dominance is (3 : 1) and Phenotypic Ratio of Co-dominance is (1 : 2 : 1) (3 : 1) * (1 : 2 : 1) = 3 : 6 : 3 : 1 : 2 : 1.

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