In the pea plant, purple colour of the flower is dominant over white colour. Progeny obtained by crossing pure purple-flowered plants with white-flowered plants are self-pollinated. The resulting plants produced are:

All purple flowered plants.

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Purple flowered plants and white flowered plants in a 3 : 1 ratio.

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Purple flowered and white flowered plants in equal numbers.

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All white flowered plants.

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Solution

The correct option is B
Purple flowered plants and white flowered plants in a 3 : 1 ratio.

If pure purple-flowered plants are crossed with white-flowered plants, all plants of $F_{1}$ generation are heterozygous purple-flowered plants. Upon self-pollination of $F_{1}$ progeny, purple-flowered and white flowered plants are produced in a 3:1 ratio.

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Similar questions

In the pea plant, purple colour of flower is dominant over white colour. Progeny obtained by crossing pure purple flowered plants with white flowered plants are self-pollinated. The resulting plants produced are:

Q. Application based questions.
A pea plant with purple flowers was crossed with white flowers, producing 50 plants with only purple flowers. On selfing, these plants produced 482 plants with purple flowers and 162 with white flowers. What genetic mechanism accounts for these results? Explain.

Q. A plant with purple flowers was crossed with white flowers producing 50 plants with only purple flowers. Selfing these plants produced 482 plants with purple flowers and 162 plants with white flowers. What genetic mechanism accounts for these results? Explain. [3]

The genotype of purple flowered pea plants is denoted as WW and that of white flowered pea plants as ww. When these two are crossed?

What colour of flowers would you except in the

F 1

progeny?

Q. Three Mark Questions :
A plant with purple flowers was crossed with white flowers producing 50 plants with only purple flowers. On selfing these plants produced 482 plants with purple flowers and 162 plants with white flowers. What gametic mechanism accounts for these results? Explain.

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