21. Cloning is a method by which numbers of genetically identical organisms are derived from a single organism by

A. vegetative propagation
B. vegetative initiation
C. vegetative termination
D. none of these

22. Which of the following is/are the method of transfection for making transgenic animals?

A. Transfer of whole nuclei
B. Transfer of whole individual chromosomes or fragment
C. Transfer of DNA
D. All of the above

23. DNA microinjection into the egg has been used to produce which of the following transgenic animals?

A. Mice
B. Chicken
C. Pigs
D. All of these

24. Transgenic goats produce a variant of human tissue-type plasminogen activator protein in

A. blood
B. urine
C. milk
D. muscles

25. For the rapid genetic progress, embryo transfer (ET)

A. will be as potent a tool as AI (artificial insemination)
B. will not be as potent a tool as AI (artificial insemination)
C. ET can’t be used at all
D. will be a superior tool than AI