Principles of Inheritance and Variation Question 71
71. Ratio of complementary genes
(a) $9: 3: 4$
(b) $12: 3: 1$
(c) $9: 3: 3: 4$
(d) $9: 7$
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Answer : d
Hints & Solution
(d) In complementary gene interaction, both the non allelic pair independently produce similar phenotypes and when present together produce a new phenotype. So, that $F_2$ ratio $9: 3: 3: 1$ would become $9: 7$.
