Question

In many cultivated ornamental flowers, the number of petal whorls is higher than the one in wild type. Extra petals are generally modified
a. Sepals
b. Petals
c. Stamens
d. Pistils

Answer 1

Hint: We all know that the extra petals in the cultivated ornamental flowers are generally a modification of an organ which represents the male reproductive organ consisting of a stalk or a filament and an anther. This part with extra tissue along their sides adds to the extra petals or petaloids.

Complete answer:
• Petals are one of the parts of the corolla of a flower and they are often brightly coloured.
• Stamen is the structure in a flowering part that consists of anther and filament and produces pollen grains.
• All the flowers contain petal, sepal, stamen and carpels.
• Double flowered are those varieties of flowers that have extra petals. In these varieties, all the reproductive organs are converted into petals.
• These varieties often arise when the stamen of the flower is replaced by the petals due to homeotic mutation. This stamen part with an extra tissue along their sides adds to the extra petals or petaloids.
• A double-flower state is one of the most notable characteristics that improve the value of ornamental flowers because it usually has a large flower size by the duplication of petals.

Hence, the correct answer is option (C).

Note: Homeotic mutation is defined as a condition where one organ in a developing organism changes with another organ. This mutation is the reason for the double flower condition. According to some theory, AGAMOUS is a double flower gene that encodes a protein responsible for the tissue modification of stamens and carpels.