"Down's Syndrome" is:
Correct answer: D. Trisomy 21
- A. Monosomy 18
- B. Monosomy 21
- C. Trisomy 19
- D. Trisomy 21
- E. Trisomy 26
Explanation
"Down's Syndrome" is caused by Trisomy 21, not any of the other options you mentioned. Here's an explanation of each of the options you provided:1. Monosomy 18: Monosomy means the absence of one copy of a chromosome. In this case, it refers to having only one copy of chromosome 18, which is not related to Down's Syndrome.2. Monosomy 21: This means having only one copy of chromosome 21, which is not the cause of Down's Syndrome. Down's Syndrome is associated with having an extra copy of chromosome 21.3. Trisomy 19: Trisomy refers to having an extra copy of a chromosome. Trisomy 19 is not related to Down's Syndrome. Down's Syndrome involves an extra copy of chromosome 21.4. Trisomy 21: This is the correct answer. Down's Syndrome is caused by an individual having three copies of chromosome 21 instead of the usual two. This extra genetic material leads to the characteristic features and health issues associated with Down's Syndrome.5. Trisomy 26: Trisomy 26 is not a known genetic condition associated with Down's Syndrome. Trisomy 21 is the relevant trisomy in this context.
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