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3.4 Variation and the Human Genome Project

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Question 8

A yeast colony develops from one cell. DNA testing later shows that some cells in the colony carry an allele that was absent from the original cell.

Which statement best explains how this allele first arose?

[1]
A

a random mutation produced a different version of the gene

B

natural selection altered the base sequence of the original allele

C

DNA replication combined copies of the original allele into a new one

D

conditions around the cells produced the allele because it was needed

Markscheme

3.4 Variation and the Human Genome Project Questions

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

96 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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