A breeder wants to increase drought tolerance in a genetically varied population of bean plants. The breeder can record several different results for each plant.
Which result should the breeder use to choose the parent plants?
The total leaf area of each plant when given a plentiful water supply.
The number of identical plantlets produced from each plant by tissue culture.
The mass of seeds each plant produces when given a low water supply.
The mass of seeds each plant produces when given extra mineral ions.
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.