**Core Concept:**
Frame shift mutations are a type of genetic mutation that occurs when a single nucleotide is added or deleted, leading to a change in the reading frame of the genetic code. This can result in a significant alteration in the amino acid sequence of the protein being synthesized.

**Why the Correct Answer is Right:**
A frame shift mutation does not affect the complete amino acid sequence if it occurs in multiples of three nucleotides. This is because the genetic code is triplet-based, also known as codons. When a frame shift mutation occurs in multiples of three nucleotides (e.g., 3, 6, 9, etc.), the reading frame is maintained, and the complete sequence of amino acids is not altered.

**Why Each Wrong Option is Incorrect:**
Option A: A frame shift mutation occurring in multiples of two nucleotides (e.g., 2, 4, 6, etc.) will result in a change in the reading frame and affect the complete amino acid sequence.
Option B: A frame shift mutation occurring in a single nucleotide (e.g., 1, 3, 5, etc.) will disrupt the reading frame and also affect the complete amino acid sequence.
Option C: A frame shift mutation occurring in multiples of one nucleotide (e.g., 1, 2, 3, etc.) will disrupt the reading frame and cause a frame shift, leading to a significant alteration in the amino acid sequence.

**Clinical Pearls:**
Frame shift mutations can lead to severe and often lethal genetic disorders due to the disruption of the reading frame and alteration of the amino acid sequence. These mutations are considered as one of the four basic types of genetic mutations (point mutations, insertions, deletions, and frame shift mutations) and can cause significant health implications for the affected individual.

**Correct Answer:** .