Question

Transgenic animals are those which have

• A. Foreign RNA in all its cells
• B. Foreign DNA in all its cells
• C. Foreign DNA in some of its cells
  
• D. DNA and RNA both in the cells
  

Answer 1

The correct option is B Foreign DNA in all its cells

Transgenic animals
Transgenic animals are those that have one or more foreign genes (DNA sequences) from another species introduced into them by artificial means.
Usually, these animals are developed by introducing foreign genes into the fertilised egg. Since all the cell lines in the body are developed from the fertilised egg, hence, all the cells of the animal have foreign genes.

Final answer
b. Foreign DNA in all its cells