Worksheet for the Edexcel 9-1 GCSE biology specification on genetic definitions and genetic crosses on two pages. Dominant and recessive, alleles and genes and Punnet squares are all covered.
Sensitivity note: the worksheet includes cystic fibrosis as a case study. This pack is almost identical to my AQA pack covering the same content, you could use either if you teach both courses. Specification reference: B3.12, B3.13, B3.14.
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