Polyploidy · Botany

Which statement best describes an allopolyploid formed from a sterile interspecific hybrid?

  1. Chromosome doubling permanently removes every single chromosome present
  2. The hybrid permanently becomes a seedless, flowerless moss
  3. Chromosome doubling can restore fertility via homologous pairing
  4. The plant immediately and permanently stops producing any cells
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Correct answer: Chromosome doubling can restore fertility via homologous pairing

In many sterile hybrids, chromosomes from different species cannot pair properly. Doubling the chromosome number can create matching homologs, allowing regular meiosis and fertility.

Difficulty: Medium Question 16 of 20

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