Question detail
Which option avoids the common misconception in this objective for Reproduction, Genetic inheritance: students must explain that a recessive allele is expressed only when two copies are present and no dominant allele is present.
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. Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches Genetic inheritance because students must explain that a recessive allele is expressed only when two copies are present and no dominant allele is present.
- B. Common misconception: Explaining protein coding without naming the gene as the relevant section of DNA. This would blur DNA vs genes instead of testing Genetic inheritance.
- C. Partial misconception: Treating DNA as if it always means one gene. This misses the objective focus on explain that a recessive allele is expressed only when two copies are present and no dominant allele is present.
- D. Terminology mix-up: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / Genetic inheritance.
Answer
The correct option is Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches Genetic inheritance because students must explain that a recessive allele is expressed only when two copies are present and no dominant allele is present.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in Genetic inheritance.
Explanation
The correct option is Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches Genetic inheritance because students must explain that a recessive allele is expressed only when two copies are present and no dominant allele is present.. Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches Genetic inheritance because students must explain that a recessive allele is expressed only when two copies are present and no dominant allele is present. is correct because A DNA base sequence is the storage format; a gene is the named instruction unit. The learning objective says students must explain that a recessive allele is expressed only when two copies are present and no dominant allele is present, so the answer must stay inside Genetic inheritance. The alternative options are wrong because they either explaining protein coding without naming the gene as the relevant section of dna., treating dna as if it always means one gene., or drift away from do not use dna, gene, and chromosome as interchangeable answers..
Common mistake
Misunderstanding Recessive Alleles
Students often think that a recessive allele can be expressed even if only one copy is present.
Emphasize that a recessive allele is only expressed when two copies are present and no dominant allele is present.
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