Write a short note on Down's syndrome.

Explanation

### Step-by-Step Text Solution for Down's Syndrome

1. **Definition of Down's Syndrome**:
Down's syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21. This condition is also known as Trisomy 21.

**Hint**: Remember that Down's syndrome is specifically linked to an extra chromosome.

2. **Nature of Chromosomal Disorders**:
...