In human beings, there are 23 pairs of chromosomes. Down’s syndrome disorder is concerned with chromosome number _____?

In human beings, there are 23 pairs of chromosomes. Down’s syndrome disorder is concerned with chromosome number _____?

انسانوں میں ، کروموسوم کے 23 جوڑے ہیں۔ ڈاؤن سنڈروم ڈس آرڈر کا تعلق کروموسوم نمبر _____ سے ہے؟
Explanation

A person with Down's syndrome has three copies of chromosome 21 instead of the normal two.

It leads to developmental and intellectual delays.