What are animals called when their DNA is manipulated to possess and express an extra (foreign) gene?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Transgenic animals
Animals whose DNA has been manipulated so that they possess and express an extra (foreign) gene are called transgenic animals. Transgenic rats, rabbits, pigs, sheep, cows and fish have been produced, but most of the transgenic animals that exist are mice. They are used to study gene function and disease, to make biological products and to test the safety of vaccines and chemicals.
NCERT Extract:
Transgenic Animals – “Animals that have had their DNA manipulated to possess and express an extra (foreign) gene are known as transgenic animals. Transgenic rats, rabbits, pigs, sheep, cows and fish have been produced, although over 95 per cent of all existing transgenic animals are mice.”