In a cross between white-flowered parents, {{F}_{1}}
progeny was uniformly purple-flowered. The {{F}_{2}}
progeny showed a phenotypic ratio 9 : 7 between purple-flowered and white-flowered plants. The above result indicates that the flower colour is controlled by
A) Two alleles
B) One allele
C) Three alleles
D) Four alleles
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the answer to your question is A
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