Question

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:

• A. All purple flowered plants.
• B. Purple flowered plants and white flowered plants in a 3 : 1 ratio.
• C. Purple flowered and white flowered plants in equal numbers.
• D. All white flowered plants.

Answer 1

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.