Klinefelter’s Syndrome is characterized by:
A. Tall stature
B. Short stature with lack of feminine characteristics
C. A small, round head with tall stature
D. Development of feminine characteristics
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A and D only
Klinefelter’s syndrome is a chromosomal disorder. It is caused by an extra copy of the X chromosome, which gives the karyotype 47, XXY. The person develops as a male, but some feminine development is also seen, such as development of the breast (gynaecomastia). Such individuals are sterile.
A. Tall stature — Correct. A person with Klinefelter’s syndrome is tall, with some feminine characters.
B. Short stature with lack of feminine characteristics — Incorrect. Short stature with underdeveloped feminine characters describes Turner’s syndrome (45, XO), a disorder of females.
C. A small, round head with tall stature — Incorrect. A small, round head is a feature of Down’s syndrome (trisomy of 21), and those persons are short, not tall.
D. Development of feminine characteristics — Correct. Although the person is male, feminine characters such as breast development appear.
NCERT Extract:
Chromosomal Disorders – “… Klinefelter’s Syndrome : This genetic disorder is also caused due to the presence of an additional copy of X-chromosome resulting into a karyotype of 47, XXY. Such an individual has overall masculine development, however, the feminine development (development of breast, i.e., Gynaecomastia) is also expressed (Figure 4.17 a). Such individuals are sterile.”
