Question

Pollen grains do not germinate on the stigma of the same flower. The phenomenon is

• A. Prepotency
• B. Self sterility
• C. Dicliny
• D. Dichogamy

Answer 1

The correct option is B Self sterility

When a pistil having functional female gametes fails to set seeds with viable and fertile pollen, which can bring about fertilisation in another pistil, the pistil and pollen are said to be incompatible and this is known as incompatibility.

When the sexual incompatibility is between individuals of different species, it is interspecific.

When the sexual incompatibility is between individuals of same species, it is intraspecific. This intraspecific incompatibility is also called as self-incompatibility which may include many reasons like pollen fail to germinate on the surface of the stigma of the same flower, which is also known as self-sterility.

So, the correct answer is B.