D1.3.3—Insertion and deletion consequences
Insertions and deletions can shift the reading frame when bases are added or removed outside complete codon triplets during gene mutation.
- Syllabus
- First assessment 2025
- Objective
- D1.3.3
- Level
- HL
Concept essentials
- Insertions add bases to a DNA sequence.
- Deletions remove bases from a DNA sequence.
- Frameshifts occur when inserted or deleted bases are not in multiples of three.
- A frameshift changes downstream codons and can strongly disrupt protein function.
ConceptIB Biology HL