Down syndrome is a chromosomal condition caused by the presence of an extra copy of chromosome 21, a state known as trisomy 21. This genetic anomaly results in a specific set of physical characteristics and developmental differences. Individuals with this syndrome often experience intellectual disability, which varies in severity. Medical management and intervention focus on promoting developmental milestones, addressing physical health issues that commonly accompany the condition, and facilitating educational and therapeutic support to maximize overall quality of life. The condition is typically detected through prenatal screening or postnatal evaluation.