How have transgenic animals proved to be beneficial in: (i) Production of biological products (ii) Chemical safety testing
(i) Production of biological products: (a) Medicines required for treating human diseases are obtained by genetic engineering. (b) a-1-antitrypsin used to treat emphysema. (c) Transgenic cow ‘Rosie’ produces human-protein enriched milk. (ii) Chemical safety (Toxicity/safety testing) Transgenic animals are made that carry genes that make these more sensitive toxic substances than non-transgenic animals.