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Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
Differentiate between geitonogamy and xenogamy in plants. Which one between the two will lead to inbreeding depression and why?
✓

Answer

S. No
Geitonogamy
Xenogamy
(i)
It is transfer of pollen grains from the anther to the stigma of another flower of same plant.
It is transfer of pollen grains from the anther to the stigma of a different plant.
(ii)
The pollen grains are genetically similar to the plant.
The pollen grains are genetically different from the plant.

Geitonogamy will lead to inbreeding depression because the pollen grains are genetically similar, which results in inbreeding. Continued inbreeding will thus reduce fertility and productivity.

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