2021TrialMultiple choice

Q19

1 mark

Question

Shared information

Two linked genes in humans have the following alleles. Gene 1 Gene 2 A: secretor B: production of protein X a: non-secretor b: no protein X produced Information regarding these traits in a family was collected and the chromosome composition of each member for these two genes was established. It was found that, in all, there were four different chromosome compositions in the family. The four types are shown in the following table: The pedigree for the family is shown below Codes for interpreting the pedigree Questions 19 and 20 are on the following page

Uncropped shared source page 12 for questions 19, 20; requires human review and cropping — Reviewed shared visual · source page 12

Which of the following is correct about the genotype of the identified individual?
A. I–1 is type 1.
B. II–2 is type 2.
C. III–2 is type 3.
D. III–12 is type 4.

Try the question before revealing the answer.

Syllabus alignment

Module 5 · Heredity

Genetic VariationInterpret inheritance patterns, pedigrees and Punnett squares to model genotype combinations.

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