IB Biology HL D3.2.12 Haemophilia Questions

Infer haemophilia carrier and affected genotypes from pedigrees and explain X-linked recessive transmission with allele notation in IB Biology HL D3.2.12.

Exam points

Explain haemophilia as an X-linked recessive disorder, using allele notation to distinguish carrier females from affected males.
Use parental X-linked genotypes and a Punnett grid to trace haemophilia through a family and predict affected sons or carrier daughters.

[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 IB Biology HL D3.2.12 Haemophilia Questions question 1 — IB Biology HL

Deduce the genotype of Queen Victoria's daughter Alice.

$\mathrm{X}^{\mathrm{H}} \mathrm{X}^{\mathrm{h}}$ ;

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IB Biology HL D3.2.12 Haemophilia Questions question 1