Question

Down Syndrome is caused by:
An extra chromosome on the 21st pair resulting in 47 chromosomes in every cell of the body
An extra chromosome on the 23rd pair resulting in 43 chromosomes in every cell of the body
Faulty genes
None of the given options

Answers

GPT-4o mini
Down syndrome is caused by **an extra chromosome on the 21st pair resulting in 47 chromosomes in every cell of the body**. This condition is also known as Trisomy 21. Therefore, the correct answer is the first option.

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