Zadanie 4c
The pedigree shows a rare inherited overactivity of a gland. Discuss the most likely inheritance pattern using evidence from the diagram.
- Materiał graficzny
Inferring inheritance from pedigrees
Deduce compatible inheritance patterns and individual genotypes from family data and discuss shared ancestry risks.
Tę umiejętność sprawdza 15 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 15 Otwórz w wyszukiwarce z filtrami
Zadanie 20
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
Zadanie 4b
A model pedigree concerns a fully penetrant dominant allele D causing a hereditary condition; d does not cause it. Assume no new mutation and no phenocopies. (i) Calculate the probability that individuals1 and2 have an affected child. (ii) Explain why the…
- Materiał graficzny
Zadanie 13
Assume complete penetrance and no new mutations. Which inheritance pattern best fits this pedigree? A. Autosomal dominant B. X-linked dominant C. Autosomal recessive D. Y-linked
- Materiał graficzny
Zadanie 20
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 13
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 15
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 3a
State every possible genotype of the female in generation I.
- Materiał graficzny
Zadanie 3b
Draw a Punnett grid for the possible children of couple P, using R and r.
- Materiał graficzny
Zadanie 16
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 4a
State the probability that P has haemophilia.
- Materiał graficzny
Zadanie 15
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
Zadanie 4a
Draw the correct symbol and shading for X.
- Materiał graficzny
Zadanie 4b
Calculate the probability that Y carries the variant allele.
- Materiał graficzny
Zadanie 4c
Explain how the family group in box B excludes X-linked inheritance of this variant.
- Materiał graficzny