Question detail
Which option correctly contrasts the named ideas for Reproduction, Genetic inheritance: students must construct (HT only) a genetic cross using a Punnett square and use probability to make predictions.
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 construct (HT only) a genetic cross using a Punnett square and use probability to make predictions.
- 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 construct (HT only) a genetic cross using a Punnett square and use probability to make predictions.
- 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 construct (HT only) a genetic cross using a Punnett square and use probability to make predictions.. 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 construct (HT only) a genetic cross using a Punnett square and use probability to make predictions.. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Genetic inheritance because students must construct (HT only) a genetic cross using a Punnett square and use probability to make predictions. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must construct (HT only) a genetic cross using a Punnett square and use probability to make predictions, 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 Punnett Squares
Students often incorrectly fill in Punnett squares by not accurately representing the alleles of the parents, leading to incorrect predictions of offspring genotypes.
To fix this, ensure that you correctly identify and write down the alleles of each parent before filling in the Punnett square. Double-check that each box represents a possible combination of alleles from the parents.
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