alleryPhenotypic ratio in dihybrid F2 cross (RrYy × RrYy):
A1:1:1:1
B3:1
C9:3:3:1
DRandom
Answer & Solution
Correct answer: C. 9:3:3:1
Two independent traits, each Rr × Rr (3:1) and Yy × Yy (3:1).
**Combined:** 9 R_Y_ : 3 R_yy : 3 rrY_ : 1 rryy.
**Mendel's pea:** 9 round-yellow : 3 round-green : 3 wrinkled-yellow : 1 wrinkled-green.
Validates independent assortment for unlinked genes.
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