Q28 / 200 · MHT CET - Medical 2026 (21 April Shift 1) · Biology
In a monohybrid cross between pure tall pea plant with pure dwarf pea plant, how many types of genotypes are found in the $F_2$ generation ?
- A4
- Correct answerB3
- C8
- D9
Solution
A pure tall pea plant has the genotype $TT$ and a pure dwarf pea plant has the genotype $tt$.
The cross between them ($TT \times tt$) produces $F_1$ offspring with the genotype $Tt$ (heterozygous tall).
Selfing the $F_1$ generation ($Tt \times Tt$) yields the $F_2$ generation.
The genotypes produced in the $F_2$ generation are $TT$, $Tt$, and $tt$.
Thus, there are $3$ types of genotypes found in the $F_2$ generation.
Answer: 3
The cross between them ($TT \times tt$) produces $F_1$ offspring with the genotype $Tt$ (heterozygous tall).
Selfing the $F_1$ generation ($Tt \times Tt$) yields the $F_2$ generation.
The genotypes produced in the $F_2$ generation are $TT$, $Tt$, and $tt$.
Thus, there are $3$ types of genotypes found in the $F_2$ generation.
Answer: 3
Hence, the correct answer is option: 'B'.