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NEET 2026 (Phase 1) · BiologyPrevious Year Question

Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?

Answer: (B) (2) Xenogamy. Answer: B.

  1. A.(1) Autogamy
  2. B.(2) Xenogamy✓
  3. C.(3) Geitonogamy
  4. D.(4) Cleistogamy

Correct Answer

(B) (2) Xenogamy

Solution & Explanation

Answer: B. Xenogamy is the transfer of pollen grains from the anther to the stigma of a different plant, and it is the only kind of pollination that brings genetically different types of pollen to the stigma. Autogamy (within the same flower) and geitonogamy (another flower of the same plant) are genetically equivalent to self-pollination, and cleistogamy is invariably autogamous — none of these introduce genetically different pollen. NCERT: Ch 1, p.12, lines 43-48 — "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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