Biology Inheritance / Variation & Genetics UHS 2022
PMDC Verified Question 66 of 94
Mode of inheritance in humans can be traced through:
A
Experimental mating
B
Chi square chart
C
Pedigree analysis
D
Probability analysis
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Pedigree analysis
Concept:

Because ethical and practical constraints prevent controlled breeding experiments in humans, geneticists must rely on historical family data.

Solution:

  • One of the most powerful tools in human genetic studies is pedigree analysis.
  • A pedigree is a visual chart that maps the presence or absence of a trait across multiple generations of a family.
  • By analyzing these charts, geneticists can reliably trace and determine the mode of inheritance (e.g., autosomal dominant, X-linked recessive) for specific human traits.


Why other options are incorrect:

  • Experimental mating: Crossing diverse lines is used in plant and animal genetics (like Mendel's peas), but is ethically impossible in humans.
  • Chi square chart: A statistical tool to check if observed data fits expected ratios, not a tool for tracing family lineages.

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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