9 : 3 : 3: 1 ratio is modified to 9: 7 ratio due to
A
Complementary gene
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B
Epistatic gene
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C
Hypostatic gene
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D
Supplementary gene
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Solution
The correct option is A Complementary gene The complimentary gene is an interaction of two dominant non-inter allelic gene in which each gene have its own effect but when come together to interact a new trait is developed and the Mendelian ratio 9:3:3:1 is changed to 9:7 due to complimentation of both genes.