A breeder wants tomato plants with an inherited ability to produce large fruits. Plants P and Q were grown with different amounts of fertiliser. P produced larger fruits than Q.
Which investigation would best help the breeder decide whether this difference is inherited?
Compare offspring of P and Q grown with the same amount of fertiliser.
Compare P given more fertiliser with its offspring given the same amount.
Compare offspring of P given more fertiliser with offspring of Q given less.
Compare P and Q again using the original different amounts of fertiliser.
44 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.