A breeding programme uses embryo transplanting to produce genetically identical piglets.
What happens to the embryos in the final stage of embryo transplanting?
They grow into adults, and those with the wanted feature are selected for breeding.
A useful gene is added to each embryo so the animals make a desired protein.
They are placed into host mothers, which carry them until birth.
They are given an electric shock so that they start dividing into balls of cells.
80 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.