Clarissa's mother was 38 years old when she gave birth to her. clarissa suffers from an intellectual disability, and doctors have diagnosed that her condition is due to the extra chromosome that she received at the time of conception. identify the condition afflicting clarissa.

The condition afflicting Clarissa is "Down Syndrome".
Down syndrome (DS or DNS), otherwise called trisomy 21, is a hereditary issue caused by the presence of all or part of a third duplicate of chromosome 21. It is regularly connected with physical development delays, facial highlights, and gentle to direct intelligent disability.