OCR A Level Biology B (Advancing Biology)
OCR A Level Biology B (Advancing Biology) Patterns of Inheritance Exam Questions
Free OCR A Level Biology B (Advancing Biology) exam questions on Patterns of Inheritance, with mark schemes. Covers variation, monohybrid and dihybrid crosses, linkage, epistasis, chi-squared and evolution.
Patterns of Inheritance exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Biology Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Biology B (Advancing Biology) Patterns of Inheritance
This topic covers inheritance and population genetics.
What you need to know
- Variation Genetic and environmental causes.
- Crosses Monohybrid, dihybrid, codominance, sex linkage and multiple alleles.
- Chi-squared Testing if observed ratios match expected ratios.
- Population genetics Hardy-Weinberg, genetic drift, speciation and artificial selection.
Common mistakes in Patterns of Inheritance
- Forgetting degrees of freedom.
- Using Hardy-Weinberg with non-equilibrium populations without comment.
- Writing sex-linked alleles without X notation.
Try three Patterns of Inheritance exam-style questions
1. State the Hardy-Weinberg equations. (1 mark)
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p + q = 1 and p² + 2pq + q² = 1.
2. Explain what epistasis is. (1 mark)
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One gene affects the expression of another gene.
3. Explain allopatric speciation. (2 marks)
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Populations are geographically separated (1), different selection pressures cause reproductive isolation (1).
Patterns of Inheritance FAQs
What does Patterns of Inheritance cover?
Genetic crosses, chi-squared and evolution.
What does a significant chi-squared show?
The difference from the expected ratio is not due to chance.
What is genetic drift?
Random change in allele frequencies, most significant in small populations.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
