A farmer wants to use selective breeding to produce a flock of sheep in which most animals have a high meat yield. Four sheep of breeding age have been reared under the same conditions.
| Sheep | Sex | Estimated meat yield at maturity in kg |
|---|---|---|
| P | female | 18 |
| Q | female | 22 |
| R | male | 25 |
| S | male | 20 |
The farmer plans to mate sheep P with sheep S, use every offspring as a parent when it is mature, and end the programme after the offspring have bred once.
Describe how the farmer should revise this plan to produce the required flock. Use information from the table.
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.