Which of the following is NOT a common characteristic of Turner syndrome?

Turner syndrome is a chromosomal condition that affects females and is characterized by the complete or partial absence of one of the two X chromosomes. The common characteristics of Turner syndrome include short stature, webbed neck, and coarctation of the aorta, which are all commonly observed physical and anatomical features associated with this condition.

Short stature is a hallmark sign, often leading to significant implications for growth and development. The webbed neck arises from the abnormal development of the lymphatic system and is another typical physical manifestation. Coarctation of the aorta occurs when there is a narrowing of the aorta, which is a known cardiovascular anomaly frequently associated with Turner syndrome.

On the other hand, Down syndrome, which is also known as trisomy 21, results from the presence of an extra chromosome 21 and has a distinctly different set of characteristics. While both Turner syndrome and Down syndrome are genetic disorders, they are not related, and Down syndrome is not associated with the features commonly seen in Turner syndrome. Therefore, identifying Down syndrome as the option that does not share common characteristics with Turner syndrome is accurate and underscores the distinct nature of these two conditions.