Key learning objectives
Mock papers launch from 1 August 2026. New papers will be added regularly from this date.
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gcse · biology · Pearson Edexcel · All papers
Releases 1 August 2026
Ultimate and Lifetime users can create one saved set of 4 extended-response questions for this topic and mark answers with examiner-style feedback.
Examiner-style long-answer practice with automatic marking, improvement advice and ProofCoach tracking.
hard
Single-gene inheritance model
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Monohybrid inheritance prediction
| total offspring (offspring) | probability of recessive phenotype (fraction) |
|---|---|
| 96 | 1/4 |
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Survival of beetles with different colours
| beetle colour (phenotype) | starting population (beetles) | survived predation (beetles) |
|---|---|---|
| green | 100 | 72 |
| brown | 100 | 31 |
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Counter model outcomes
| trial size (offspring modelled) | dominant phenotype (offspring) | recessive phenotype (offspring) |
|---|---|---|
| 20 | 13 | 7 |
| 200 | 151 | 49 |
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Paying students get 20 stored MCQs per generation session and 2sessions each month. Your set is saved here so you can reset and retake it without using another allowance. If the bank is running low, replenishment happens in the background.