If 120 plants are produced on crossing pure red and pure white flowered pea plants, then the ratio of offspring will be
A
90 red : 30 white
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B
30 red : 90 white
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C
60 red : 60 white
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D
All red
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Solution
The correct option is B All red Genotype of pure red-flowered (dominant) pea plant: RR Genotype of pure white-flowered (recessive) pea plant: rr P generation: RR x rr F1 generation: Rr (red flowers) Thus, from a cross between pure red and pure white-flowered pea plants, only red-flowered pea plants are obtained. Hence, all 120 plants obtained from the given cross are red-flowered plants.