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IB Biology HL D1.3.1 Gene Mutations Questions

In IB Biology HL D1.3.1, gene mutations are changes to the DNA base sequence. The main types are substitution, insertion, deletion and duplication.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Define a gene mutation as a change in the DNA nucleotide or base sequence.
  • Identify and distinguish substitution, insertion, and deletion as gene-mutation types at the DNA sequence level.

IB Biology HL D1.3.1 Gene Mutations Questions question 1

[Maximum number: 1]

Duchenne muscular dystrophy (DMD) is a sex-linked genetic disorder caused by a recessive allele resulting from mutations in the X-linked dystrophin gene. This causes the degeneration of cardiac and skeletal muscle. These mutations can include deletions, insertions and base substitution mutations.

Distinguish between deletion and insertion mutations.

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