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6.1 Reproduction

6.1 Reproduction

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Question 26
H

A woman does not have cystic fibrosis, but her father has the disorder. She has children with a man who has cystic fibrosis.

Cystic fibrosis is caused by a recessive allele. Assume each birth is independent. What is the probability that at least one of their next two children will have cystic fibrosis?

[1]
A

14\frac{1}{4}41​

B

34\frac{3}{4}43​

C

12\frac{1}{2}21​

D

18\frac{1}{8}81​

Markscheme

6.1 Reproduction Questions

  1. GCSE
  2. /Biology
  3. /6.1 Reproduction

76 exam-style questions on AQA GCSE Biology 6.1 Reproduction, covering 6.1.1 Sexual and asexual reproduction, 6.1.2 Meiosis, 6.1.3 Advantages and disadvantages of sexual and asexual reproduction, 6.1.4 DNA and the genome, 6.1.5 DNA structure, 6.1.6 Genetic inheritance, 6.1.7 Inherited disorders, and 6.1.8 Sex determination. Each one has a worked solution and a mark scheme showing where the marks go.

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