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Mystery #3Tier 2-3genetics / cloning

What is cloning, and how can two living things be exactly the same?

In stories, a clone is a perfect copy of a person, right down to the last freckle. In real life, scientists really have made clones: copies of plants, of frogs, and even of a sheep. But real clones are not quite the copies the stories promise. So what IS a clone, and how close does it actually come?

Dolly the sheep, preserved and mounted on straw in a glass display case at the National Museum of Scotland.
Photo: Sgerbic · CC BY-SA 4.0 · via Wikimedia Commons

Your guess

What's your hunch? What would have to be the same for two living things to be true copies of each other?

There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.

Make a guess to unlock the hints and the answer.