Question

Which event is represented by the above diagram, related to chromosomal aberrations?

• A. Deletion
• B. Duplication
• C. Inversion
• D. Translation

Hint:

Inversions can affect gene expression if they disrupt regulatory regions or genes.

Answer 1

The Correct Option is C

The question asks about the chromosomal aberration illustrated in the diagram, with multiple-choice options provided. The correct answer is 'Inversion'. Let's explore the reasoning behind this and understand why the other options are not correct.

1. Understanding Chromosomal Inversion:
   • An inversion occurs when a segment of a chromosome breaks off and reattaches in the reverse direction. This results in the genetic material being inverted within the chromosome.
   • This type of structural alteration does not involve a change in the amount of genetic material, but rather a reorganization.
2. Comparing with Other Types of Aberrations:
   • Deletion: This involves the removal of a chromosome segment, resulting in a loss of genetic material. It would not show inverted regions.
   • Duplication: This involves repeating a segment of a chromosome, resulting in an increase in genetic material. Unlike inversion, the orientation remains the same.
   • Translocation: This occurs when a segment of one chromosome is transferred to another, non-homologous chromosome. This involves two different chromosomes rather than a single chromosome, unlike inversion.
3. Conclusion:
   • The diagram, by illustrating a section of a chromosome with a reversed sequence, corresponds to an inversion.