Transgenic animals are useful in -
A. Study of diseases
B. Biological products
C. Vaccine safety
D. Adaptive radiation
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A, B and C only
A transgenic animal is an animal whose DNA has been changed by the addition of a gene from another source. Such animals have several uses.
A. Study of diseases — Correct. Transgenic animals are made to show the symptoms of a human disease. This helps to understand how the disease develops and to test treatments.
B. Biological products — Correct. Transgenic animals can make useful human proteins, such as alpha-1-antitrypsin, for use as medicine.
C. Vaccine safety — Correct. Transgenic mice are developed to test the safety of vaccines, such as the polio vaccine, before they are used on humans.
D. Adaptive radiation — Incorrect. Adaptive radiation is a natural evolutionary process. Different species arise from a common ancestor in a region, as in Darwin’s finches. It is not a use of transgenic animals.
NCERT Extract:
Transgenic Animals – “… (ii) Study of disease: Many transgenic animals are designed to increase our understanding of how genes contribute to the development of disease.”
Transgenic Animals – “… (iii) Biological products: Medicines required to treat certain human diseases can contain biological products, but such products are often expensive to make.”
Transgenic Animals – “… (iv) Vaccine safety: Transgenic mice are being developed for use in testing the safety of vaccines before they are used on humans.”