Question:
One of the following is an example of incomplete sex linkage ..................
One of the following is an example of incomplete sex linkage ..................
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Incomplete sex linkage involves genes located on the X chromosome but with some autosomal influence, as seen in retinitis pigmentosa.
Updated On: Mar 6, 2026
- Red green colour blindness
- Myopia
- Retinitis pigmentosa
- Haemophilia
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The Correct Option is C
Solution and Explanation
Step 1: Understanding incomplete sex linkage.
Incomplete sex linkage occurs when a gene is located on the X chromosome but its expression is not fully dependent on the X chromosome. Retinitis pigmentosa is an example of this condition.
Step 2: Analyzing the options.
(A) Red green colour blindness: Incorrect, this is a clear example of sex-linked inheritance.
(B) Myopia: Incorrect, myopia is not an example of incomplete sex linkage.
(C) Retinitis pigmentosa: Correct, retinitis pigmentosa is an example of incomplete sex linkage as it is partially dependent on X chromosome inheritance.
(D) Haemophilia: Incorrect, this is a sex-linked recessive disorder, not an example of incomplete sex linkage.
Step 3: Conclusion.
The correct answer is (C) Retinitis pigmentosa, as it is an example of incomplete sex linkage.
Incomplete sex linkage occurs when a gene is located on the X chromosome but its expression is not fully dependent on the X chromosome. Retinitis pigmentosa is an example of this condition.
Step 2: Analyzing the options.
(A) Red green colour blindness: Incorrect, this is a clear example of sex-linked inheritance.
(B) Myopia: Incorrect, myopia is not an example of incomplete sex linkage.
(C) Retinitis pigmentosa: Correct, retinitis pigmentosa is an example of incomplete sex linkage as it is partially dependent on X chromosome inheritance.
(D) Haemophilia: Incorrect, this is a sex-linked recessive disorder, not an example of incomplete sex linkage.
Step 3: Conclusion.
The correct answer is (C) Retinitis pigmentosa, as it is an example of incomplete sex linkage.
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