Question detail
Which of the following best describes the relationship between genotype and phenotype for a polygenic trait?
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. The phenotype is determined by a single dominant allele.
- B. The phenotype is the same for all genotypes.
- C. The phenotype results from the combined effect of several alleles.
- D. The phenotype is unrelated to the genotype.
Answer
The correct option is The phenotype results from the combined effect of several alleles.. This answer is correct because it matches the approved learning objective to explain that most characteristics result from multiple genes interacting rather than single-gene inheritance in the subtopic Genetic inheritance.
Explanation
The correct option is The phenotype results from the combined effect of several alleles.. The phenotype results from the combined effect of several alleles. is correct because it directly supports the approved learning objective to explain that most characteristics result from multiple genes interacting rather than single-gene inheritance. This belongs to the subtopic Genetic inheritance 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 Genetic inheritance.
Common mistake
Misunderstanding Multiple Gene Interaction
Students often believe that characteristics are determined by a single gene, failing to recognize the role of multiple genes interacting.
Emphasize the concept of polygenic inheritance, where multiple genes contribute to a single trait, and provide examples to illustrate how these interactions can influence characteristics.
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