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  4. Heterozygous tall and violet flower garden pea plants were selfed, and total text1200 plants are collected. What will be the total number of plants with first dominant and second recessive traits?

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Q. Heterozygous tall and violet flower garden pea plants were selfed, and total $\text{1200}$ plants are collected. What will be the total number of plants with first dominant and second recessive traits?

NTA AbhyasNTA Abhyas 2022

Solution:

In dihybrid cross in $\text{F2}$ generation, out of $\text{16}$ plants, three will be with first dominant and second recessive; therefore, the number of such plants will be $\left(3 / 16 \, \right)\text{\times }\text{ 1200 = 225}$ .