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3.4 Variation and the Human Genome Project

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Question 24
H

Researchers study a disease-associated variant in 800 people. The variant occurs in 25% of the people. Of those with the variant, 15% have the disease.

How many people have the variant but do not have the disease?

[1]
A

170170170

B

200200200

C

510510510

D

680680680

Markscheme

3.4 Variation and the Human Genome Project Questions

  1. GCSE
  2. /Biology
  3. /3.4 Variation and the Human Genome Project

40 exam-style questions on Edexcel GCSE Biology 3.4 Variation and the Human Genome Project, covering 3.4.1 Causes of variation, 3.4.2 Outcomes of the Human Genome Project, 3.4.3 Genetic variation within a population, and 3.4.4 Effects of genetic mutations on phenotype. Each one has a worked solution and a mark scheme showing where the marks go.

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