What is another name for Trisomy 21?

Trisomy 21 is commonly referred to as Down syndrome, which occurs when an individual has three copies of chromosome 21 instead of the usual two. This condition leads to a combination of physical and intellectual disabilities. Characteristics often associated with Down syndrome include distinct facial features, developmental delays, and a higher risk for certain medical conditions. Understanding this terminology is important in genetics and healthcare, as it helps in identifying and discussing the challenges and support needs of individuals with this condition. The other terms listed refer to different genetic conditions, each with its own specific characteristics and implications, which is why they are not synonymous with Trisomy 21.