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Which term describes the chromosomal abnormality of having extra chromosomes?

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Answer:

polysomy.

Step-by-step explanation:

User Danny Kirchmeier
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The term is polysomy. The prefix "poly-" means many and "somy" has to do with chromosomes. So, polysomy means that there is an extra chromosome. This abnormality occurs not only in humans, but also in plants, fungi, etc.
User Thalinda Bandara
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