Question

How have transgenic animals proved to be beneficial in:
(a) Production of biological products
(b) Chemical safety testing

Answer 1

(a) (Rosie - transgenic cow) produced human protein lactalbumin enriched milk alpha -1 antitrypsin used to treat emphysema.

(b) (Toxicity Testing) - more sensitive to toxic substances. results obtained in less time.

Detailed Answer :

Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (α-1-antitrypsin) used to treat emphysema, phenylketonuria (PKU) and cystic fibrosis. 

Transgenic animals are made that carry genes which make them more sensitive to toxic substances than non-transgenic animals. They are then exposed to the toxic substances and the effects studied. Toxicity testing in such animals will allow us to obtain results in less time.

Answer 2

a) Transgenic animals are used in the production of insulins , hormones, proteins etc.

b) These animals are resistant to the chemicals like fertilizers etc.

Explanation:

Transgenic animals are those that are produced by performing some genetic changes in the genotype of an organisms.