Multiple choice

Which one of the following pair of organisms contains the highest and least number of chromosomes respectively?

  1. Tympanoctomys barrerae and Myrmecia pilosula

  2. Myrmecia pilosula and Ophioglossum reticulatum

  3. Ophioglossum reticulatum and Myrmecia pilosula

  4. Tympanoctomys barrerae and Drosophila melanogaster

  5. Ophioglossum reticulatum and Tympanoctomys barrerae
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C Correct answer
Explanation

Ophioglossum reticulatum (2n = 1260): Highest known number of chromosomes in any life form. Myrmecia pilosula (2n = 2): 2 for females, males are haploid and thus have one; lowest number of chromosomes among all organisms.

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