Question

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, bring genetically different types of pollen grains to stigma is:

• A. Cleistogamy
• B. Xenogamy
• C. Geitonogamy
• D. Chasmogamy

Answer 1

The correct option is B Xenogamy

The transfer of pollen grains that are shed from the anther to the stigma of a pistil is termed pollination. It is of the following types:

• Autogamy: Pollination is achieved within the same flower. Some plants such as Viola, produce two types of flowers. One type of flowers has exposed anthers and stigma and are referred to as chasmogamous flowers. The other type do not open at all and are referred to as cleistogamous flowers.
• Geitonogamy: Transfer of pollen grains from the anther to the stigma of another flower of the same plant. Since the pollen grain comes from the same plant, it will be genetically similar to the stigma.
• Xenogamy: Transfer of pollen grains from anther to the stigma of a different plant. It brings genetically different types of pollen grains to the stigma.