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The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is:
Xenogamy is the ONLY type of pollination that transfers pollen from an anther of one plant to the stigma of a genetically different plant, introducing new genetic variations! Geitonogamy is between flowers of the same plant (genetically autogamous). Match Option (1)!
Angiosperm pollination is categorized into three types depending on the genetic relatedness of the pollen donor and recipient:
Because pollen originates from a genetically distinct donor sporophyte, xenogamy introduces novel allele combinations and promotes outcrossing vigor, providing the ultimate raw material for adaptive evolutionary variation.
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Xenogamy is the transfer of pollen grains from anther to the stigma of a different plant, bringing genetically different pollen to the stigma.
Geitonogamy involves transfer to another flower of the same plant, meaning all pollen grains are genetically identical to the parent.
Chasmogamy refers to flowers with exposed anthers and stigmas that open at maturity, not a classification of pollination based on pollen origin.
Cleistogamy refers to closed, non-opening flowers that undergo obligate autogamous self-pollination.
Geitonogamy involves pollinating agents (looks like cross-pollination ecologically), but genetically it is pure self-pollination since pollen comes from the same plant.
"Xenogamy: Transfer of pollen grains from anther to the stigma of a different plant. This is the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma."
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