Scientists have genetically engineered a species of sheep to produce higher annual yields of wool.
Name the class of enzymes used to cut the desired gene from the donor DNA.
Name the enzyme used to join the gene into the DNA of the recipient sheep's genome.
The average annual wool yield of a standard non-genetically engineered sheep of this breed is 4.5 kg4.5\text{ kg}4.5 kg. The average annual wool yield of a genetically engineered sheep of the same age and kept under the identical conditions is 7.8 kg7.8\text{ kg}7.8 kg.
Calculate the percentage increase in wool yield caused by genetic engineering. Give your answer to 2 significant figures.
25 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.