Q.What are transgenic animals? Give examples.

Step 1. Define transgenesis: it is the deliberate introduction of extra, foreign DNA — the transgene — into an animal's genome, done so that the resulting trait is stable and heritable, passed on to the animal's offspring. Step 2. Define the resulting animal: a transgenic animal (also called a genetically modified or genetically engineered organism) is one whose genome has been altered this way, carrying and expressing the inserted gene throughout its cells. Step 3. List the species the chapter names as having actually been made transgenic: mice, rats, rabbits, pigs, cows, goats, sheep and fish. Step 4. Give specific worked examples from elsewhere in the chapter: Rosie, the first transgenic cow (1997), was engineered to secrete human alpha lactalbumin in her milk; transgenic goats have similarly been engineered to express human alpha lactalbumin; and transgenic mice are routinely used to test vacc …

State the definition of transgenesis/transgenic animals, then support it with the specific named examples (Rosie, tr …

• Giving the definition without any concrete named example from the chapter. …