biologyTopic 6 · Inheritance, Variation and EvolutionPaper 2Grades 8–9

Should a gene-edited crop be released?

Starting scenario

A gene-edited wheat line yields 18% more during drought and has 35% less fungal disease. In three field sites, a resistance allele appears in 2%, 6% and 19% of nearby wild grass seeds. The edited plants show unchanged protein content, but the trial lasted only two seasons.

You will work through 8 staged questions that build up the science you need. Then you will answer one big-picture question from memory, with no checklist to help you — and only afterwards will the full connection map be revealed.