NEET UG 2025 · Botany · Question 145
NEET 2025 Botany, question 145
Question 145 of the NEET 2025 paper (code 45) is a Botany question from Principles of Inheritance and Variation. Its idea, F2 Phenotypic Ratio 9:3:3:1, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 3.
Updated 2026-10-08
Q145 · Botany
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?
- 1Phenotypic ratio - 1 : 2 : 1
- 2Phenotypic ratio - 3 : 1
- 3Phenotypic ratio - 9 : 3 : 3 : 1Official answer
- 4Phenotypic ratio - 9 : 7
Official answer: option 3 · NTA final answer key
Same idea
The only question on F2 Phenotypic Ratio 9:3:3:1
No other NEET paper from 2017–2026 tested this exact idea.
F2 Phenotypic Ratio 9:3:3:1: every question and how it was framed
The chapter
Principles of Inheritance and Variation in ten years of NEET
43 questions from 2017–2026, asked in 10 of 10 papers, about 4.1 a paper. Independent Assortment alone had 2.