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  4. In a given plant, red colour (R) of fruits is dominant over white fruit (r): and tallness (T) is dominant over dwarfness (t). If a plant with genotype RRTt is crossed with a plant of genotype rrtt, what will be the percentage of tall plants with red fruits in the next generation?

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Q. In a given plant, red colour $(R)$ of fruits is dominant over white fruit $(r)$ : and tallness $(T)$ is dominant over dwarfness (t). If a plant with genotype $RRTt$ is crossed with a plant of genotype $rrtt$, what will be the percentage of tall plants with red fruits in the next generation?

AIIMSAIIMS 2007

Solution:

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Phenotype of different plants is
(i) All plants contain red fruits.
(ii) $50 \%$ plants are tall with red fruits,
(iii) $50 \%$ plants are dwarf with red fruits