What is a common trait of individuals with Down Syndrome?

Individuals with Down Syndrome often exhibit a single transverse palmar crease, commonly referred to as a Simian line. This characteristic is one of the physical traits associated with the condition and is caused by an atypical development of the hand during fetal growth. It is significant in the context of diagnosing Down Syndrome and is found in a notable number of individuals with the condition.

The presence of a single crease can serve as a marker for further genetic evaluation. However, while it is often seen in individuals with Down Syndrome, it is not exclusive to them; it can also occur in the general population. This makes it a common and identifiable trait associated with the condition.

In contrast, other options do not accurately reflect common traits associated with Down Syndrome. While exceptional musical talent may be found in some individuals, it is not a defining trait. Intelligence levels vary widely and are not consistently high. Additionally, individuals with Down Syndrome often face health and fitness challenges, making it unlikely that exceptional fitness would be a common characteristic. Thus, the single transverse palmar crease stands out as a well-recognized trait linked specifically to Down Syndrome.