A breeder crosses a disease-resistant tomato plant with a plant that produces large fruits. The offspring vary in both disease resistance and fruit size.
Which next step is most likely to establish a variety with both characteristics?
Breed the largest-fruited offspring together; continue selecting only for fruit size in each generation.
Breed offspring showing both characteristics together; continue selecting for both in each following generation.
Breed the original parents together again; continue replacing their offspring after each following generation.
Breed all resistant offspring together; continue selecting only for disease resistance in each generation.
44 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.