Polyploidy · Botany

Why are many triploid plants seedless or highly sterile?

  1. They lack functional roots, leaves, and stems entirely
  2. They cannot form flowers or reproductive structures at all
  3. Their chromosomes are composed entirely of cellulose fibers
  4. Odd chromosome sets cause irregular pairing during meiosis
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Correct answer: Odd chromosome sets cause irregular pairing during meiosis

Triploids have an odd number of chromosome sets, making meiotic pairing uneven. This often produces unbalanced gametes, leading to sterility or seedlessness.

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