A breeder selects pet rabbits that remain calm when handled and breeds them together. The calmest offspring are selected for breeding in the next generation.
All the rabbits are assessed under the same conditions. A painful inherited jaw condition in the rabbits is caused by a recessive allele.
| Generation | Rabbits that remain calm when handled in % | Rabbits with the painful jaw condition in % | Number of breeding adults used |
|---|---|---|---|
| 0 | 38 | 3 | 72 |
| 6 | 64 | 8 | 36 |
| 12 | 82 | 17 | 18 |
Evaluate whether the breeder should continue the current breeding programme.
100 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.