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
Inferring inheritance from pedigrees
Deduce compatible inheritance patterns and individual genotypes from family data and discuss shared ancestry risks.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 8 Otwórz w wyszukiwarce z filtrami
Zadanie 30
The pedigree concerns an X-linked recessive condition. Let XN be the unaffected allele and Xn the condition-associated allele. Which genotype or genotypes are possible for Z? A. XnXn only B. XNXn only C. XNXN or XNXn D. XNXN or…
- Materiał graficzny
Zadanie 6c
Explain what evidence in the pedigree is consistent with sex-linked inheritance.
- Materiał graficzny
Zadanie 11
The model pedigree shows a fully penetrant condition caused by a dominant allele. Assume no new mutations. Which observation excludes X-linked dominant inheritance? A. Both sexes occur in the family B. Unaffected V-1 has two unaffected parents C. The affected…
- Materiał graficzny
Zadanie 13
Assume this model condition is controlled by one gene, has complete penetrance and involves no new mutation. Where are the condition-causing alleles in affected individuals? A. Only on the Y chromosome B. Only on one X chromosome in every affected person C. On…
- Materiał graficzny
Zadanie 12
This pedigree tracks a fully penetrant X-linked recessive condition. Assume no new mutations. Which statement about the family is supported? A. I-1 must carry the allele without expressing it B. III-1 proves that an affected male cannot reach adulthood C.…
- Materiał graficzny
Zadanie 13
A hypothetical condition is caused by a fully penetrant autosomal dominant allele. The pedigree shows one family; assume no new mutations. What is the probability that the next child of II-2 and II-3 will be affected? A. 0% B. 25% C. 75% D. 50%
- Materiał graficzny
Zadanie 12
This pedigree shows a fully penetrant inherited condition. Assume no new mutations. Which pattern fits it? A. Autosomal dominant inheritance B. Y-linked inheritance C. X-linked dominant inheritance D. Autosomal recessive inheritance
- Materiał graficzny