Question

Given below are two statements marked Assertion and Reason.
Assertion: Individuals with Klinefelter syndrome lose their secondary sexual characters and develop gynaecomastia.
Reason: The presence of the XYY chromosomal pattern leads to underdeveloped testes and reduced testosterone levels in affected males.

• A. Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
• C. Assertion is true and Reason is false.
• D. Both Assertion and Reason are false.

Hint:

Klinefelter = XXY; Turner = XO. These are the most commonly tested syndromes.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Klinefelter's Syndrome is a chromosomal disorder.

Step 2: Detailed Explanation:
Assertion: Klinefelter's syndrome results in sterile males with feminized characters like gynaecomastia (breast development). This is true.
Reason: The chromosomal pattern for Klinefelter's is actually XXY (47 chromosomes), not XYY. XYY is a different condition (Supermale syndrome).

Step 3: Final Answer:
Assertion is true, but Reason is false due to incorrect chromosomal pattern. Option (c).