Question detail
Which option correctly contrasts the named ideas for Reproduction, Genetic inheritance: students must explain the terms allele, dominant and recessive.
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. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Genetic inheritance because students must explain the terms allele, dominant and recessive.
- B. Reversed contrast: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing Genetic inheritance.
- C. Over-broad contrast: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on explain the terms allele, dominant and recessive.
- D. Unrelated contrast: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / Genetic inheritance.
Answer
The correct option is Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Genetic inheritance because students must explain the terms allele, dominant and recessive.. 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 Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Genetic inheritance because students must explain the terms allele, dominant and recessive.. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Genetic inheritance because students must explain the terms allele, dominant and recessive. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must explain the terms allele, dominant and recessive, so the answer must stay inside Genetic inheritance. The alternative options are wrong because they either calling a gene a whole chromosome., explaining protein coding without naming the gene as the relevant section of dna., or drift away from when asking about genes, test a section of dna, protein coding, alleles, or inherited characteristics..
Common mistake
Misunderstanding Alleles
Students often confuse the terms allele, dominant, and recessive, thinking that all alleles are dominant or that recessive alleles can be expressed in the presence of any allele.
Clarify that an allele is a variant form of a gene, dominant alleles are expressed when present, and recessive alleles are only expressed when two copies are present without a dominant allele.
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