What characterizes the physical appearance of an infant with Prader-Willi Syndrome?

An infant with Prader-Willi Syndrome typically has a distinct physical appearance that may include features such as hypotonia (decreased muscle tone), almond-shaped eyes, and specific hair and eye color traits. The common characteristics often noted in infants with this syndrome include lighter hair and blue eyes.

Blue eyes and blonde hair are particularly associated with this condition due to genetic factors that affect pigmentation. The underlying genetic anomaly in Prader-Willi Syndrome often arises from paternal deletion of genes on chromosome 15, which can influence the expression of certain traits including eye and hair color.

In considering the other descriptions, they either point to combinations of features typically not associated with Prader-Willi Syndrome or simply do not correlate with the most commonly observed traits of individuals with this condition. Focusing on the characteristics prevalent in this syndrome helps illuminate the rationale for selecting the specific combination of blue eyes and blonde hair as the correct answer.