In Mendel's monohybrid cross, the $F_2$ generation shows a phenotypic ratio of $3:1$ (dominant to recessive). The genotypic ratio is $1:2:1$ ($AA:Aa:aa$).
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NEET UG 2025 — Biology Genetics
medium
mcq
2025
Official previous-year question
Verified 30 May 2026.
Question
The phenotypic ratio of a monohybrid cross in the $F_2$ generation is:
Options
- A
1:2:1
- B
3:1
- C
9:3:3:1
- D
1:1
Solution
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