When a disease is transmitted directly from an affected father to his son, it is called:
Correct answer: C. Y-linked
- A. X-linked
- B. Autosomal
- C. Y-linked
- D. X and Y-linked
Explanation
[A] X-linked traits are not only transmitted from father to son but can be also transmitted to her daughter[B] Autosomal disease can be transferred from one parent to a child no specific pattern[C] Y-linked traits transmission occurs only in males so if a mail has a trait so should his father and paternal grandfather as well as his sons and their sons[D] Y-linked is transferred from males to males only but not X-linked
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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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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Which of the following traits is transmitted directly from an affected father to only his son?
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