Biology Inheritance / Variation & Genetics SZABMU 2024 Reconduct
PMDC Verified Question 12 of 94
Which traits are most likely to affect men than women?
A
X linked recessive
B
X linked dominant
C
Autosomal dominant
D
Autosomal recessive
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: X linked recessive
Concept:

Biological males are hemizygous (XY), meaning they possess only one X chromosome.

Solution:

  • X-linked recessive traits disproportionately affect men.
  • Because males have only one X chromosome, inheriting a single recessive mutant allele (from their mother) is enough to fully express the disease, as they lack a second healthy X chromosome to mask it.
  • Females (XX) must inherit two defective copies (one from each parent) to express the trait; otherwise, they are merely asymptomatic carriers.


Why other options are incorrect:

  • X-linked dominant: Often affects more females because they have two chances to inherit the defective X chromosome.
  • Autosomal traits: Generally affect both sexes at statistically equal rates.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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