Predicting X-linked haemophilia inheritance

Biologia IBPaper 2, maj 2026, TZ1wzorowane2 pktotwarteśrednie (szac.)

Zadanie 7d

Explain why a typical XY male cannot be an unaffected heterozygous carrier of the recessive haemophilia allele.

Biologia IBPaper 1A, maj 2026, TZ3wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 30

M carries an X-linked recessive haemophilia allele. N has no copy of that allele. What is the probability that the male T has haemophilia, disregarding new mutations? A. 100% B. 50% C. 0% D. 12.5%

• Materiał graficzny

Biologia IBPaper 1A, listopad 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 30

The pedigree concerns an X-linked recessive condition. Let X^N be the unaffected allele and Xⁿ the condition-associated allele. Which genotype or genotypes are possible for Z? A. XⁿXⁿ only B. X^NXⁿ only C. X^NX^N or X^NXⁿ D. X^NX^N or…

• Materiał graficzny

Biologia IBPaper 2, specimen 2025wzorowane2 pktotwarteśrednie (szac.)

Zadanie 6c

Explain what evidence in the pedigree is consistent with sex-linked inheritance.

• Materiał graficzny