Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 4 PCB Single Correct MCQ
Published on: August 12, 2026

Self-incompatibility is a genetic mechanism, it represents

A
negative interaction which inhibit the germination of self pollen
B
positive interaction which inhibit the germination of incompatible pollen
C
negative interaction which inhibit the germination of compatible pollen
D
positive interaction which enhance the pollen compatibility

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The correct answer is:
A

Self-incompatibity is a genetic mechanisms that prevent self-fertilisation in sexually reproducing organisms and thus encourage out-crossing and allogamy. It is a negative interaction between stigma and pollen, which inhibit the germination of incompatible pollen.

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