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Cambridge (CIE) · IGCSE · 0654

Monohybrid inheritance — Difficult

Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.

Syllabus 2028–20296 questions~60 minutesSamples 6 of 32 linked lessons

Includes extension practice

Simple monohybrid crosses and pedigrees are required. Codominance, multiple-allele ABO crosses and X-linked inheritance problems in this shared set extend the specified1:1 and3:1 models.

Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.

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