Final answer:
The alteration of gene expression due to its movement to a new chromosomal location is known as transposition. Other types of mutations, like silent mutations or indels, affect the sequence itself, not the gene's location. The correct answer is c) Transposition.
Step-by-step explanation:
The expression of an intact gene may be altered when it is moved to a new location due to a process known as transposition. This is when a segment of DNA (often including a gene) breaks away from its original position in the genome and reinserts itself in a new location. This can affect gene expression if the gene is moved to a location with different regulatory sequences or into a different chromatin environment that is more or less conducive to transcription.
Other types of mutations mentioned, such as silent mutations, insertions, and frame-shift mutations due to indels (insertions or deletions), are different in that they affect the DNA sequence of the gene itself, rather than its location within the genome. A silent mutation does not change the amino acid sequence of a protein, while an indel can result in a frame-shift, altering the entire downstream amino acid sequence. Insertions add extra nucleotides, and deletions remove them, which can also disrupt the reading frame if not in multiples of three.
Therefore, the correct option for this situation is c) Transposition, as it directly corresponds to the scenario where gene expression is altered by the relocation of an intact gene.