Question

Which of the following is NOT a characteristic of Turner's syndrome?

• A. Webbed neck
• B. Stunted growth
• C. Gynaecomastia
• D. Rudimentary ovaries

Hint:

Turner's syndrome (45, XO) occurs in females and is characterized by short stature, webbed neck, and rudimentary ovaries. Gynaecomastia is a feature of Klinefelter's syndrome (47, XXY), not Turner's syndrome.

Answer 1

The Correct Option is C

Concept: Turner's syndrome is a chromosomal disorder that occurs in females due to the absence of one X chromosome. The chromosomal composition is: \[ 45, XO \] This condition results from nondisjunction during meiosis, leading to monosomy of the X chromosome. Common characteristics of Turner's syndrome include:
• Short or stunted growth
• Webbed neck
• Broad chest with widely spaced nipples
• Underdeveloped or rudimentary ovaries
• Sterility

Step 1: Identify the features of Turner's syndrome. Individuals with Turner's syndrome are phenotypically female but show several developmental abnormalities such as:
• Webbed neck
• Short stature (stunted growth)
• Rudimentary ovaries These features occur due to the absence of one X chromosome.

Step 2: Analyze the incorrect option. Gynaecomastia refers to the abnormal enlargement of male breast tissue. This feature is typically associated with Klinefelter's syndrome (\(47, XXY\)) in males. Therefore, gynaecomastia is not a characteristic of Turner's syndrome.

Step 3: Select the correct option. Among the given choices, the feature that is NOT associated with Turner's syndrome is: \[ Gynaecomastia \]