Multiple choice

Which one of the following is not a common feature of gametophytic selfincompatibility systems?

  1. Pollen is 3-celled

  2. Pistil is wet

  3. Rejection reaction occurs in the style

  4. In vitro germination of pollen is easy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The question asks which is NOT a common feature of gametophytic self-incompatibility (GSI) systems. In GSI, pollen is typically 2-celled (not 3-celled) at release. In vitro germination of GSI pollen is notoriously difficult due to complex recognition mechanisms requiring stylar factors. The pistil is typically dry (not wet) in GSI systems. The rejection reaction often occurs in the style, which IS a common feature. Thus, option D 'In vitro germination of pollen is easy' is NOT a common feature and is the correct answer.

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