Biology Inheritance / Variation & Genetics MDCAT 2019
PMDC Verified Question 73 of 94
In genetics, the term locus refers to the ____ of the gene on the chromosome.
A
Frequency
B
Position
C
Copy
D
Inversion
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Position
Concept:

Chromosomes are highly organized structures of DNA. Every gene has a specific, fixed address on its designated chromosome.

Solution:

  • The specific physical location or position of a gene on a chromosome is called its locus.


Why other options are incorrect:

  • Frequency: Refers to how often an allele appears in a population (allele frequency).
  • Inversion: A chromosomal mutation where a segment breaks off and reattaches in reverse order.

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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