Which one of the following is a sex-linked inheritance?
Correct answer: A. Baldness
- A. Baldness
- B. Albinism
- C. None of these
- D. Myopia
Explanation
Males with higher testosterone levels have a dominant baldness gene, whereas females with lower testosterone levels have a recessive baldness gene. So baldness has sex linked inheritance.
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About X-linked Recessive Inheritance
X-linked recessive inheritance involves genes on the X chromosome, so males express a recessive allele with no corresponding allele on their single X chromosome, while females may be carriers. Pedigrees cover haemophilia and red-green colour blindness, including carrier mothers, affected sons and the absence of father-to-son transmission.
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