Question detail
Which option correctly contrasts the named ideas for Reproduction, Genetic inheritance: students must use probability to predict the results of a single-gene cross.
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 use probability to predict the results of a single-gene cross.
- 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 use probability to predict the results of a single-gene cross.
- 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 use probability to predict the results of a single-gene cross.. 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 use probability to predict the results of a single-gene cross.. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Genetic inheritance because students must use probability to predict the results of a single-gene cross. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must use probability to predict the results of a single-gene cross, 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
Misinterpreting allele frequencies
Students often assume that the probability of an offspring inheriting a particular allele is simply the proportion of that allele in the parents, without considering the number of alleles each parent contributes.
Explain that each parent contributes one allele per gene, so the probability is based on the combination of the two alleles each parent carries, not the overall allele frequency in the population.
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