A farmer breeds two cows that both produce large volumes of milk. Some of their offspring produce only small volumes of milk. Which statement explains this?
High milk yield is an acquired characteristic, so it is not inherited.
Alleles for high milk yield are always recessive to those for low yield.
The offspring inherit a new combination of alleles from both parents.
Selective breeding causes mutations in the alleles for high milk yield.
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.