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Learning objective

Use probability to predict the results of a single-gene cross.

Read the explanation, check the common trap, then practise with flashcards and questions.

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Topic

Reproduction

Subtopic

Genetic inheritance

Aqa Gcse BiologyInheritance, variation and evolution

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Quick explanation

Use probability to predict the results of a single-gene cross

  • This point belongs to Reproduction, especially Genetic inheritance.
  • You need to be able to use probability to predict the results of a single-gene cross.
  • The key ideas to know are gene and probability.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

geneprobability

Why it matters

This objective helps connect Genetic inheritance to exam-style questions, flashcards, and revision notes for Reproduction.

Quick student answer

How do you use probability to predict the results of a single-gene cross in exam questions?

Direct answer

In Biology, this page helps you answer questions about probability to predict the results of a single-gene cross within Reproduction. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are Gene and Probability.

Key terms

  • Gene: In Genetic inheritance, Gene means the specific Unit 4.6 idea used to answer this objective: students must use probability to predict the results of a single-gene cross. Keep the term curriculum-specific by applying this boundary: DNA is the molecule; a gene is a functional section of that molecule. Do not use Gene as a vague inheritance word; link it to Reproduction and explain the exact role it plays in AQA GCSE Biology.
  • Probability: The likelihood of a particular genotype or phenotype occurring in the offspring of a single-gene cross, expressed as a ratio or percentage.

Common trap

Misinterpreting allele frequencies: Explain that each parent contributes one allele per gene, so the probability is based on the combination of the two alleles each parent carries, not the overall allele frequency in the population.

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