Biology Inheritance / Variation & Genetics ETEA 2023 Retake
PMDC Verified Question 30 of 94
Locus of a gene on a chromosome means its:
A
Position
B
Function
C
Start point
D
End point
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Position
Concept:

Chromosomes act as the physical carriers of genes. Each gene is mapped to a specific physical coordinate.

Solution:

  • The locus of a gene on a chromosome refers specifically to its physical position or location.
  • It is the fixed address where all alleles for that particular gene can be found on homologous chromosomes.


Why other options are incorrect:

  • Function: Describes the trait or protein the gene codes for, not its locus.
  • Start/End point: Refers to promoters or terminators within the DNA sequence, not the overarching position of the gene itself.

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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