In any dihybrid cross ration is 9:3:3:1.
The phenotype ratio predicted for dihybrid cross is 9 : 3 : 3 : 1. If parents are heterozygous, and one allele for each trait exhibits complete dominance.
In Mendel's dihybrid cross the phenotypic ratio was 9 : 3 : 3 : 1.
Hence , C is correct option
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