A phenotypic ratio not obtained by Mendel was

3 : 1

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1 : 2 : 1

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1 : 1 : 1 : 1

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9 : 3 : 3 : 1.

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Solution

The correct option is B 1 : 2 : 1

A.3:1 – Mendel’s monohybrid phenotypic ratio

B.1:2:1 – Phenotypic and genotypic ratio of Incomplete dominance and Co-dominacne.

C.1:1:1:1 – Mendel’s dihybrid test cross phenotypic and genotypic ratio.

D.9:3:3:1 – Mendel’s dihybrid cross phenotypic ratio.
So, the correct option is’1:2:1’.

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