Farmers have used selective breeding to produce cows that give large volumes of milk.
State what is meant by selective breeding.
Give two characteristics, other than high milk yield, that a farmer might select for when breeding dairy cows.
Describe how a farmer could use selective breeding to produce cows that give a high milk yield.
Give one disadvantage of selective breeding.
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.