Transfer of pollen grains from the anther to stigma of another flower of the same plant is called

The correct answer is B, Geitonogamy. Geitonogamy is the transfer of pollen grains from the anther of one flower to the stigma of another flower on the same plant. In the way it happens it is like cross-pollination, because an outside agent such as an insect or the wind carries the pollen; but genetically it is like self-pollination, because the pollen comes from the same plant and brings no new genes. The word comes from the Greek geiton, meaning neighbour, which is an easy way to remember it: pollen goes to the neighbouring flower. Option A is wrong because autogamy is pollination within the same flower, where pollen reaches the stigma of the very flower that produced it, as in closed cleistogamous flowers. Option C is wrong because xenogamy is the transfer of pollen to a flower of a different plant, the only type that brings genetically different pollen to the stigma. Option D is wrong because geitonogamy is the exact name for this process. Exam tip: autogamy same flower, geitonogamy same plant, xenogamy different plant.