Q13 of 57 Page 85

Transgenic animals are the animals in which a foreign gene is expressed. Such animals can be used to study the fundamental biological process, phenomenon as well as for producing products useful for mankind. Give one example for each type.

Animals in which a foreign of DNA is incorporated so as to obtain desired products or to study its effects on the biological processes are called the transgenic animals.


- E.g. – in 1997, Rosie a cow has been made transgenic to produce α-lactalbumin rich milk (2.4g/L).


Animal models have been developed to provide α-1-antitrypsin used by humans for the treatment of emphysema.


- In Canada, gene for spider web has been isolated from spiders & was inserted into goat. The goat now produces spider webs along with milk.


Due to the great tensile strength & light weight these spider web fibres are used for the development of military uniforms & tennis rackets.


More from this chapter

All 57 →
11

How is a mature, functional insulin hormone different from its prohormone form?

 12

Gene therapy is an attempt to correct a genetic defect by providing a normal gene into the individual. By this the normal function can be restored. An alternate method would be to provide the gene product (protein/enzyme) known as enzyme replacement therapy, which would also restore the function. Which in your opinion is a better option? Give reason for your answer.

 14

When a foreign DNA is introduced into an organism, how is it maintained in the host and how is it transferred to the progeny of the organism?

 15

Bt cotton is resistant to pest, such as lepidopteron, dipterans and coleopterans. Is Bt cotton also resistant to other pests as well?