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How the Amazon molly stays genetically healthy (Level A1) — brown wooden letter blocks on white surface

How the Amazon molly stays genetically healthyCEFR A1

31 Mar 2026

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Adapted from Brian Consiglio-U. Missouri, Futurity • CC BY 4.0

Photo by Brett Jordan, Unsplash

Level A1 – Beginner
2 min
73 words
  • The Amazon molly is an all-female fish.
  • It reproduces by cloning itself and has no males.
  • Cloning often causes genetic problems in animals.
  • Scientists at a university studied the fish.
  • The fish has lived for a very long time.
  • Researchers found the fish DNA looked healthy.
  • A natural process helps fix bad genes in DNA.
  • This process reduces harmful changes and keeps health.
  • The finding may help future animal and plant research.

Difficult words

  • cloning — making an animal with the same genes
  • reproduce — have babies or make young animals
    reproduces
  • genetic — about genes and inherited traits
  • gene — part of DNA that gives traits
    genes
  • process — a series of natural steps or actions
  • scientist — a person who studies nature and facts
    Scientists

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Would you like to see the Amazon molly?
  • Have you ever seen a fish in an aquarium?
  • Do you think this finding can help future research?

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