1 : 2 : 1 phenotypic and genotypic ratios occur in case of

Blending/intermediate inheritance

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Pseudoalleles

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Multiple alleles

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Complementary genes

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Solution

The correct option is B Blending/intermediate inheritance

A.Blending /intermediate inheritance – Phenotypic and genotypic ratio is. 1:2:1

B.Pseudoalleles – No specific phenotypic and genotypic ratio.

C.Multiple alleles – No specific phenotypic and genotypic ratio.

D.Complementary genes – Phenotypic ratio is 9:7.
So, the correct option is ‘Blending/intermediate inheritance’.

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