Inheritance & EvolutionDiagram

Visual: Inherited Disorders

Part of Inherited Disorders — GCSE Biology

This diagram covers Visual: Inherited Disorders within Inherited Disorders for GCSE Biology. Genetic disorders, family pedigrees, and probability calculations It is section 3 of 10 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 3 of 10

Practice

25 questions

Recall

20 flashcards

Visual: Inherited Disorders

Inherited disorders diagram showing cystic fibrosis (recessive ff, thick mucus, Punnett square for carriers) and polydactyly (dominant P, extra digits), family tree symbols, and genetic testing considerations

Remember: Cystic fibrosis = RECESSIVE (ff) — both parents must be carriers | Polydactyly = DOMINANT (P) — only one allele needed

Keep building this topic

Read this section alongside the surrounding pages in Inherited Disorders. That gives you the full topic sequence instead of a single isolated revision point.

Genetic Testing and Ethical Issues How It Works: Inheriting CF and Polydactyly Two Inherited Disorders for AQA Key Definitions

Practice Questions for Inherited Disorders

What is an inherited disorder?

A. A disease caused by faulty genes passed from parents to offspring
B. A disease caught from other people
C. A disease caused by poor diet
D. A disease caused by aging

1 markfoundation

Describe how genetic screening can be used to detect inherited disorders.

4 marksstandard

Quick Recall Flashcards

What is the effect of a dominant allele on polydactyly?

Extra fingers or toes; Can be surgically corrected; Not usually harmful

What is the effect of a recessive allele on cystic fibrosis?

Thick, sticky mucus in lungs and digestive system; Difficulty breathing, frequent infections

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Genetic Testing and Ethical Issues

How It Works: Inheriting CF and Polydactyly