What are common physical features of Klinefelter syndrome?

Klinefelter syndrome is a chromosomal condition that affects males, typically characterized by the presence of an extra X chromosome (47,XXY). The physical features associated with Klinefelter syndrome include a combination of traits influenced by this chromosomal abnormality.

The correct choice highlights features such as female hair and fat distribution, which often manifests as a more feminine body shape, along with gynecomastia, which is breast tissue development in males. These features arise because the additional X chromosome leads to hormonal imbalances and can also influence the distribution of body fat and hair patterns, contributing to a phenotype that may appear more female-like compared to typical male development.

Additional common characteristics of Klinefelter syndrome include hypogonadism, where there is reduced function of the testes, and delayed puberty, as the hormonal changes typical of male puberty may be altered or delayed due to the genetic makeup. However, since the question focuses on physical features, the mention of feminine characteristics and gynecomastia aligns most closely with the observable traits associated with the condition.