Researchers use the human reference sequence produced by the Human Genome Project to compare DNA from two populations. The table shows the mean percentage of bases matching the reference sequence for samples from each population.
| Population | Mean percentage of bases matching the reference sequence |
|---|---|
| A | 99.92% |
| B | 99.81% |
Explain what these results suggest about the ancestry of the two populations.
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.