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IB Biology HL 2.5.12 Sex-linked pedigrees and carrier analysis Question Bank

Practise IB Biology HL 2.5.12 by analysing extended pedigrees and deducing carrier or affected genotypes.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Deduce carrier and affected genotypes from a sex-linked pedigree.
  • Explain haemophilia inheritance across generations using X-linked notation.

D3.2.12—Haemophilia question 1

[Maximum number: 1]

Hemophilia is a sex-linked disease that affected some members of royal families in Europe during the 19th and 20th centuries.

Figure for Question D3.2.12—Haemophilia question 1 — IB Biology HL

Deduce the genotype of Queen Victoria's daughter Alice.

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