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MA_775_DIABLO [31]
3 years ago
8

Down syndrome occurs when an individual has an extra copy of chromosome 21. This

Biology
1 answer:
Digiron [165]3 years ago
6 0

Answer:

C. A mutation

Explanation:

Down syndrome is a genetic disorder in which there is a partial or full extra chromosome in a person. Genetic disorders are caused by some sort of mutation or combination of mutations.

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