alleryThe phenotypic ratio in the F₂ of a Mendelian dihybrid cross (with two independently assorting genes) is
A3 : 1
B1 : 2 : 1
C9 : 3 : 3 : 1
D1 : 1 : 1 : 1
Answer & Solution
Correct answer: C. 9 : 3 : 3 : 1
The dihybrid F₂ ratio 9:3:3:1 follows directly from two independent 3:1 monohybrid ratios.
It also implies independent assortment — if the two genes were linked, the ratio would deviate.
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