In a dihybrid cross $RrYy \times RrYy$:
The phenotypic ratio is $9:3:3:1$
$$\text{Round Yellow (R\_Y\_)} = \frac{9}{16}, \quad \text{Wrinkled Green (rryy)} = \frac{1}{16}$$
$$\text{Ratio} = 9:1$$
Back to NEET UG 2026 Genetics
NEET UG 2026 — Biology Genetics
medium
mcq
2026
Official previous-year question
Verified 30 May 2026.
Question
In a dihybrid cross between $RrYy \times RrYy$, the phenotypic ratio of round yellow to wrinkled green is:
Options
- A
$9:1$
- B
$3:1$
- C
$9:3$
- D
$1:1$
Solution
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