First slide
Inheritance of Two Genes
Question

Which of the given cross will result in 9 : 3 : 3 : 1 phenotypic ratio?

Easy
Solution

When RrYy x RrYy then the phenotypic ratio is 9:3:3:1.  Based on dihybrid crosses, i.e., crosses between plants differing in two pairs of traits, Mendel proposed the law of independent assortment.

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