JAMB Biology 2022 Objective — Question 28
Question 28 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2022 Objective paper, with the correct answer and a full explanation.
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28. The gene that is only located on X-chromosomes is said to be
- A. (A) expressed in males only
- B. (B) dominant
- C. (C) expressed in females only
- D. (D) sex linkedCorrect
Explanation
Sex-linked characters are located only on the X-chromosome and are usually recessive; a male, having only one copy of the X-chromosome, is either normal or affected, while a female may be normal, a carrier, or affected.
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