Down's Syndrome Each year, there are about three thousand to five thousand people who are diagnosed with Down's Syndrome. in the United States alone. The way in which Down's Syndrome occurs is when there is an abnormality in chromosome 21. Therefore, most people with Down's Syndrome have an extra 21 chromosome. Instead of the normal number of 46 chromosomes in each cell, the person with Down's has 47 chromosomes. People with Down's Syndrome have physical abnormalities and phsychological ones. …showed first 75 words of 876 total…

…showed last 75 words of 876 total…eyes * Extra folds of skin located at the inside corner of each eye, near the nose (called epicanthal folds) * Rounded cheeks * Small, misshapen ears * Small, wide hands * An unusual, deep crease across the center of the palm (called a simian crease) * A malformed fifth finger * A wide space between the big and the second toes * Unusual creases on the soles of the feet * Overly-flexible joints (sometimes referred to as being double-jointed) * Shorter than normal height.