Question detail
Question 2: Explain use direct proportion and simple ratios to express outcomes of a genetic cross in Genetic inheritance.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Reproduction
Question
Question 2: Explain use direct proportion and simple ratios to express outcomes of a genetic cross in Genetic inheritance.
Answer
A strong answer should explain use direct proportion and simple ratios to express outcomes of a genetic cross using the context of Genetic inheritance.
Explanation
A strong answer should explain use direct proportion and simple ratios to express outcomes of a genetic cross using the context of Genetic inheritance. This supports the approved learning objective: Use direct proportion and simple ratios to express outcomes of a genetic cross. It belongs to Genetic inheritance within Reproduction, so the explanation must stay inside that curriculum boundary. Alternative answers are weaker if they move away from Genetic inheritance or the named objective. This wording is unique to question variant 2 for use-direct-proportion-and-simple-ratios-to-express-outcomes-of-a-genetic-cross-exam-style-2.
Common mistake
Misinterpreting Ratios as Percentages
Students often treat the simple ratio 1:2:1 from a heterozygous cross (Aa × Aa) as if it were a percentage, writing 25%:50%:25% instead of the correct ratio of 1:2:1.
Explain that a ratio shows the relative frequency of each genotype or phenotype, not a proportion of 100. Use the ratio 1:2:1 directly, or convert it to percentages by dividing each part by the total (4) and multiplying by 100, giving 25%:50%:25% only after the conversion step.
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