A breeder is developing pepper plants that produce large fruits. The offspring are grown with different amounts of water and fertiliser before the plants with the largest fruits are selected as parents.
Why should the offspring be grown under the same conditions before the parents are selected?
Differences in fruit size would be more likely to reflect inherited variation.
Large fruits would be more likely to become common without repeated selection.
Extra water and fertiliser would be more likely to produce new alleles for large fruit.
All offspring would be more likely to inherit the same alleles for fruit size.
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.