The bananas we eat today are genetic clones of each other.
Why it is true
Commercial bananas (Cavendish) are propagated through cuttings rather than seeds. This lack of genetic diversity makes them extremely vulnerable to diseases.
Source: Agriculture
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This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.