MCQ
Number of chromosomes in Down's syndrome are
- A$46$
- ✓$47$
- C$48$
- D$49$
✓
Answer
Correct option: B.
$47$
b
Down's syndrome is due to the trisomy of $21^{\text {st }}$ pair of autosome. Therefore, a Down's syndrome patient has $47$ chromosomes, i.e., $45 A + XX / XY$.
Down's syndrome is due to the trisomy of $21^{\text {st }}$ pair of autosome. Therefore, a Down's syndrome patient has $47$ chromosomes, i.e., $45 A + XX / XY$.
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