Question detail
Which of the following is an example of a recessive disorder?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reproduction
Question
- A. Polydactyly
- B. Cystic fibrosis
- C. Huntington's disease
- D. Achondroplasia
Answer
Cystic fibrosis
Explanation
Cystic fibrosis is caused by a recessive allele, meaning two copies must be present for the disorder to manifest.
Common mistake
Misunderstanding Dominant and Recessive Disorders
Students often confuse dominant and recessive disorders, thinking that dominant disorders can skip generations.
Remember that dominant disorders appear in every generation and can affect individuals even if only one parent carries the allele, while recessive disorders require both parents to pass on the allele for the disorder to appear in the offspring.
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