Question
Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?
NEET
Zoology
Principles of Inheritance and Variation
2025
NEET 2025
NEET Zoology Question (2025) — Solution
Options
- A. Phenotypic ratio-1:2:1
- B. Phenotypic ratio-3:1
- C. Phenotypic ratio- 9: 3: 3: 1
- D. Phenotypic ratio-9:7
Answer
C. Phenotypic ratio- 9: 3: 3: 1
Step-by-step solution
A classical dihybrid cross performed by Mendel involves. A cross which was made between a pure round yellow seeded pea plant (RRYY) with wrinkled green seeded plant (rryy). Yellow colour is dominant over green and round seed shape over wrinkled seed shape. Phenotypic ratio in F2 generation
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