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

Question

UnlockIAS · Accepted Answer

Correct — B, Geitonogamy. Geitonogamy is the transfer of pollen from the anther of one flower to the stigma of a different flower borne on the SAME plant. Genetically it is still self-pollination (the two flowers share one parent plant), but because the pollen must travel between flowers it usually needs a pollinating agent, just like cross-pollination. That exactly matches the question.

Why the other options are wrong — (a) Autogamy is self-pollination WITHIN the same flower — pollen from an anther lands on the stigma of that same flower, not another flower.  (c) Xenogamy is cross-pollination — pollen is carried to the stigma of a flower on a DIFFERENT plant, not the same plant.  (d) Wrong — a specific term, geitonogamy, precisely describes flower-to-flower transfer on the same plant.

Concept: Pollination is classified by how far the pollen travels. Autogamy = pollen to the stigma of the same flower. Geitonogamy = pollen to another flower on the same plant. Xenogamy = pollen to a flower on a genetically different plant. Autogamy and geitonogamy are both genetically 'self-pollination'; xenogamy is true cross-pollination that brings in new genetic variation.

State PCS 2019 Q33 — Science & Technology PYQ with Answer

State PCS 2019 Q33 — Science & Technology PYQ with Answer