Final answer:
Down syndrome, a condition where an individual has three copies of chromosome 21, is also known as Trisomy 21. It is not the same as Trisomy 18 or Trisomy 12, which are separate chromosomal disorders.
Step-by-step explanation:
Down syndrome is also known by another name, which is Trisomy 21. This genetic condition occurs when there are three copies of chromosome 21 instead of the usual two. Trisomy 18 and Trisomy 12 are different chromosomal disorders and are not alternate names for Down syndrome.Individuals with Down syndrome often experience mental and physical impairments, but with proper assistance, their quality of life can be greatly enhanced. They also have a distinct facial appearance and may face other health challenges like congenital heart disease and vision problems. The condition can be detected in utero, and the chance of a child being born with Down syndrome increases with maternal age, particularly in women over 36.