The Most Common Genetic Diseases

5. Down Syndrome

A well-known chromosomal disorder, Down syndrome occurs when someone is born with an extra twenty-first chromosome. This condition is accompanied by lifelong intellectual and developmental delays. Research points to Down syndrome as the most common cause of childhood learning disabilities.

This genetic disorder is commonly characterized by distinct facial features, a short height, excessive flexibility, a small head, and poor muscle tone. However, symptoms vary from one individual to the next, and each person's experience with this condition is unique.