A population of beetles reproduces sexually. A disease spreads through the population. In each generation, scientists expose 100 young beetles to the disease and count how many survive.
| Generation | Young beetles that survive |
|---|---|
| 1 | 20 |
| 2 | 42 |
| 3 | 65 |
Explain how sexual reproduction could account for the change in the number of young beetles that survive.
92 exam-style questions on Edexcel GCSE Biology 3.1 Reproduction and meiosis, covering 3.1.1 Advantages and disadvantages of reproduction and 3.1.2 Role of meiotic cell division. Each one has a worked solution and a mark scheme showing where the marks go.