Scientists studied a population of lizards. Toe-pad width is inherited, and one allele is associated with wide toe pads. They measured the frequency of this allele over several generations.
| Generation | Frequency of the allele for wide toe pads (%) |
|---|---|
| 0 | 15 |
| 10 | 35 |
| 20 | 55 |
Explain whether evolution has occurred in this population. Predict the frequency of the allele for wide toe pads at generation 30 if the pattern in the data continues.
85 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.