D1.3.3—Insertion and deletion consequences Topic Practice
D1.3.3—Insertion and deletion consequences Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Students practise predicting functional consequences of insertion or deletion mutations by analysing codon reading frames.
How this is tested
- predict whether a given insertion or deletion alters the downstream amino acid sequence using a short mRNA segment
- distinguish frameshift from in-frame mutations by counting nucleotides added or removed relative to multiples
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