A researcher records two measurements for DNA in one frog body cell. The mutation frequency is assumed to be the same throughout the cell's DNA.
| Measurement | Value |
|---|---|
| Total number of DNA bases in the cell | 4.8 × 109 |
| Number of DNA bases in which, on average, one base has been changed by mutation | 1.2 × 108 |
Use the measurements in the table to calculate the expected number of DNA bases changed by mutation in this cell.
80 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.