A farmer wants to breed sheep with thicker wool. The steps the farmer must carry out are shown below, but they are not in the correct order. 1 Select the offspring with the thickest wool. 2 Choose a male and a female sheep that both have thick wool. 3 Repeat the process for many generations. 4 Breed the two sheep together. What is the correct order of the steps?
2, 1, 4, 3
2, 4, 1, 3
4, 2, 1, 3
2, 4, 3, 1
127 exam-style questions on OCR GCSE Biology 6.2 Feeding the human race, covering 6.2.1 Biological factors affecting food security, 6.2.2 Agricultural solutions to growing demand, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, 6.2.5 Steps in genetic engineering, 6.2.6 Benefits and risks of gene technology in agriculture, and 6.2.7 Biotechnological solutions to growing demand. Each one has a worked solution and a mark scheme showing where the marks go.