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Monohybrid cross: ratios in F1 and F2

This type of question, asked 4 times: 2023, 2024, 2025, 2026. All 6 questions below, oldest first.

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  1. Question 1

    2023

    9
    In an experiment with pea plants, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plant to pure short plants in F2\mathrm{F_2} generation will be

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  2. Question 2

    2023

    10
    A cross between pea plant with white flowers (vv) and pea plant with violet flowers (VV) resulted in F2\mathrm{F_2} progeny in which ratio of violet (VV) and white (vv) flowers will be :

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  3. Question 3

    2024

    12
    A cross made between two pea plants produces 50% tall and 50% short pea plants. The gene combination of the parental pea plants must be

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  4. Question 4

    2024

    12
    A cross between two tall pea plants resulted in offsprings having a few dwarf plants. The gene-combination of the parental plants must be

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  5. Question 5

    2025

    9
    When a pure-tall pea plant is crossed with a pure-dwarf pea plant, the percentage of tall pea plants in F1\mathrm{F_1} and F2\mathrm{F_2} generation pea plants will be respectively :

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  6. Question 6

    2026

    1
    The genotype of green stemmed tomato plant is denoted by ‘GG’ and that of purple stemmed tomato plant as ‘gg’. Hybrid of a cross between these two were self-pollinated to obtain F2\text{F}_2 progeny. What will be the ratio of GG, Gg and gg in this F2\text{F}_2 progeny ?

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