What are chromosomal disorders? Explain Down's syndrome in human beings?

Chromosomal disorders:

1. A chromosomal disorder is characterized by an abnormal chromosome constitution or number.
2. Down syndrome is a genetic disease caused by a defective cell division that results in an extra complete or partial copy of chromosome 21.
3. Excess genetic material causes developmental delays and physical traits in people with Down syndrome.
4. Down syndrome causes intellectual disabilities and developmental delays in people of various ages.
5. It's the most common genetic chromosomal disorder in kids, and it's also the major cause of learning disabilities. Other medical issues are also common, such as heart and gastrointestinal issues.