Question:

One of the following is an example of complete sex linkage.

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In exam context, complete sex linkage refers to traits strictly inherited through the X chromosome without recombination.
Updated On: Feb 9, 2026
  • Total colour blindness
  • Retinitis pigmentosa
  • Myopia
  • Nephritis
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The Correct Option is C

Solution and Explanation

Step 1: Understanding complete sex linkage.
Complete sex linkage refers to traits controlled by genes located on the X chromosome that do not have corresponding alleles on the Y chromosome and show no recombination.
Step 2: Evaluating the options.
(A) Total colour blindness: Incorrect — commonly cited as sex-linked but not used as a classic example of complete sex linkage in this context.
(B) Retinitis pigmentosa: Incorrect — may be sex-linked but not strictly complete.
(C) Myopia: Correct — cited as an example of complete sex linkage.
(D) Nephritis: Incorrect — not a sex-linked trait.
Step 3: Conclusion.
The correct example of complete sex linkage is myopia.
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