Question detail
Why might a recessive disorder appear in offspring even if neither parent shows symptoms?
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. Both parents are carriers of the recessive allele.
- B. One parent has a dominant allele.
- C. The disorder is caused by environmental factors.
- D. The disorder is linked to the Y chromosome.
Answer
The correct option is Both parents are carriers of the recessive allele.. This answer is correct because it matches the approved learning objective to use inheritance patterns to explain why dominant and recessive disorders appear in offspring in the subtopic Inherited disorders.
Explanation
The correct option is Both parents are carriers of the recessive allele.. Both parents are carriers of the recessive allele. is correct because it directly supports the approved learning objective to use inheritance patterns to explain why dominant and recessive disorders appear in offspring. This belongs to the subtopic Inherited disorders within Reproduction, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Inherited disorders.
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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