Q11 - Pedigree Analysis of Three Heritable Traits: Alfa, Baker and Charlie
For the three heritable features, Alfa, Baker, and Charlie, pedigree analysis was performed on pedigree A, pedigree B, and pedigree C, respectively, and the results in Figure 1 were obtained. A subsequent detailed analysis revealed that all of the inheritance patterns of Alfa, Baker, and Charlie were due to recessive alleles on the autosome.
Figure 1.
Using the information and data, determine which of the statements are true or which are false.
A. An analysis of pedigree A suggests that the inheritance pattern of characteristic Alfa could be due to a dominant allele.
B. An analysis of pedigree C suggests that the inheritance of the characteristic Charlie could be due to a dominant allele.
C. B1 and B3 of family B are definitely carriers.
D. C1 and C3 of family C are definitely carriers.
Question reproduced from IBO 2020, Theoretical Exam 1, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)