Biology - Principles of Inheritance and Variation Question with Solution | TestHub

Klinefelter's syndrome is a genetic disorder caused by the presence of an additional copy of the X chromosome, resulting in a karyotype of 47, XXY.

Individuals with this syndrome have overall masculine development, but feminine characteristics are also expressed. One of the prominent symptoms is the development of breasts, which is known as Gynaecomastia.

Webbed neck, broad shield-shaped chest, and lower posterior hair line are symptoms associated with Turner's syndrome (45, XO).

Answer: Gynaecomastia