Q114 · Practice questionSimple familiar1 mark
QUESTION 114
At one autosomal locus, allele F produces protein form F and allele S produces protein form S. FS heterozygotes produce both forms, each detectable separately. Which inheritance pattern is shown?
(A)
Codominance
(B)
Complete dominance of F
(C)
Complete dominance of S
(D)
Polygenic inheritance
WORKED SOLUTION
1 markAnswer A
Answer
A
Working
Both allele products are expressed distinctly in the heterozygote, supporting codominance. This is one locus, so it does not establish polygenic inheritance.
Marking criteria
- Select A. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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